Marilyn Adams v. Zimmer US, Inc. ( 2019 )


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  •                                    PRECEDENTIAL
    UNITED STATES COURT OF APPEALS
    FOR THE THIRD CIRCUIT
    ___________
    No. 18-3011
    ___________
    MARILYN ADAMS,
    Appellant
    v.
    ZIMMER US, INC.; ZIMMER HOLDINGS, INC.;
    ZIMMER, INC.; ZIMMER SURGICAL, INC.
    _______________________
    On Appeal from the United States District Court
    for the Eastern District of Pennsylvania
    D.C. Civ. Action No. 5-17-cv-00621
    District Judge: Honorable Edward G. Smith
    ______________
    ARGUED: April 17, 2019
    Before: AMBRO, GREENAWAY, JR., and SCIRICA,
    Circuit Judges.
    (Filed: November 20, 2019)
    Charles L. Becker [ARGUED]
    Ruxandra M. Laidacker
    Kline & Specter
    1525 Locust Street
    19th Floor
    Philadelphia, PA 19102
    Joseph A. Osborne, Jr.
    Andrew Norden
    Ami Romanelli
    Osborne & Francis
    433 Plaza Real Boulevard
    Suite 271
    Boca Raton, FL 33432
    Counsel for Appellant
    Dana E. Becker
    Troy S. Brown
    Morgan Lewis & Bockius
    1701 Market Street
    Philadelphia, PA 19103
    Bruce G. Jones      [ARGUED]
    Faegre Baker Daniels
    90 South 7th Street
    2200 Wells Fargo Center
    Minneapolis, MN 55402
    Michael J. Kanute
    Faegre Baker Daniels
    2
    311 South Wacker Drive
    Suite 4400
    Chicago, IL 60606
    Counsel for Appellees
    _________________
    OPINION OF THE COURT
    _________________
    SCIRICA, Circuit Judge
    Pennsylvania’s discovery rule delays the start of the
    statute-of-limitations period until a plaintiff knows or
    reasonably should know she has suffered an injury caused by
    another. This appeal requires us to decide whether a reasonable
    juror could credit plaintiff Marilyn Adams’s contention that
    she reasonably did not know until February 12, 2015 that the
    hip implant made by defendant Zimmer, Inc., caused her the
    injuries for which she now sues. When Adams brought a
    defective design claim against Zimmer in February 2017,
    Zimmer contended she should have discovered her injury by
    January 2015, when she agreed to undergo hip implant revision
    surgery. The District Court accepted Zimmer’s argument and
    granted summary judgment on the ground that Adams’s claim
    was untimely under the discovery rule and two-year statute of
    limitations. In doing so, however, the District Court resolved
    issues of fact regarding the timing of Adams’s discovery that
    her hip pain was caused not by her poor adjustment to the
    implant but instead by the implant itself. Because Pennsylvania
    law delegates to a factfinder any genuine dispute over when a
    3
    plaintiff in Adams’s position should reasonably have
    discovered her injury, we will reverse and remand.
    I.
    Plaintiff-Appellant Marilyn Adams had a long and
    difficult history with hip pain.1 Adams first sought medical
    help from orthopedic surgeon Dr. Prodromos Ververeli in
    September 2010; he diagnosed her with advanced degenerative
    arthritis and recommended a total hip replacement. Dr.
    Ververeli counseled Adams that the hip replacement would last
    fifteen to twenty years, though he warned her the implant may
    wear down with use before then. Adams agreed to a hip
    replacement and Dr. Ververeli performed the procedure on
    January 18, 2011, implanting a Zimmer hip device.2
    Adams had no further problems with her hip for roughly
    a year and a half, but in late 2012, she started experiencing
    severe pain. Dr. Ververeli described the cause of her problems
    as “unclear” and the diagnostic process as “difficult.” App’x
    958, 228. He ran various tests attempting to identify the pain’s
    source, eventually diagnosing Adams with an infection.
    Although he warned Adams that a severe infection may require
    1
    Because we review a grant of summary judgment against
    Adams, we view all facts in the light most favorable to her and
    draw reasonable inferences in her favor. See Debiec v. Cabot
    Corp., 
    352 F.3d 117
    , 128 n.3 (3d Cir. 2003).
    2
    The implant is composed of several pieces, collectively
    referred to as the “Zimmer implant”: a femoral head; a “neck”
    that connects the femoral head to the stem; a stem that connects
    the neck to the femur; and a socket that facilitates implantation.
    4
    removing part of her hip replacement, he was able to
    successfully treat it in 2013 without removing the implant.
    Adams’s hip problems returned in November 2014,
    when she dislocated her hip while spending several months in
    Florida. Doctors in the emergency room there put the implant
    back in place, and Adams saw Dr. Ververeli when she returned
    home in early January 2015. Dr. Ververeli ordered various
    diagnostic tests, and an x-ray showed calcification around the
    implant. Dr. Ververeli testified he thought this abnormal result
    “could have been possibl[y] related to ongoing tissue reaction
    or a reaction to the actual dislocation event.” App’x 232. He
    ordered a CT scan, which showed a local adverse tissue
    reaction.
    Dr. Ververeli recommended hip revision surgery for
    Adams to replace the metal femoral head of her hip implant
    with a ceramic one. Though Adams was distraught to undergo
    hip surgery again, she consented to the operation. She went in
    for a pre-operative visit on January 30, 2015. Records from the
    visit indicate Adams was suffering from “right total hip
    metallosis,” App’x 166, which Dr. Ververeli testified is
    defined, “typically,” as “metal wear that then causes a reaction
    to the surrounding tissues”; he added the precise reaction varies
    depending on the individual patient. App’x 218. Adams
    testified she did not recall hearing about metallosis, but
    remembered being distraught over her upcoming surgery. She
    went into Dr. Ververeli’s office on February 9 to sign an
    informed consent form, which generally repeated the
    information she had been told in her pre-operative visit.
    Adams underwent the revision surgery on February 12,
    2015. Though Dr. Ververeli expected to replace only
    5
    components of the implant around the hip socket, what he
    discovered during the surgery called for a different—and much
    more drastic—revision: upon opening Adams’s hip, Dr.
    Ververeli found her muscle had largely deteriorated and metal
    debris had taken over much of the area. He discovered a
    pseudotumor roughly the size of a baseball. Rather than
    replacing the socket and implant lining, which were in fact
    largely “intact,” App’x 235, he replaced all of the main
    components of the implant hip, which had been discharging
    excessive and potentially toxic metal debris into Adams’s hip.
    Dr. Ververeli told Adams about his intraoperative findings
    after her surgery.
    Adams continued to experience hip pain after the
    surgery, and on February 10, 2017, she brought a product
    liability action against Zimmer.3 She alleged the implant was
    defectively designed in a way that led to “excessive fretting”
    (i.e., scraping between the pieces of the implant), corrosion,
    and metal wear debris; she further alleged Zimmer had failed
    to warn her of those risks. Zimmer moved for summary
    judgment on the ground that Adams’s claims were time-barred.
    The District Court agreed and entered summary judgment on
    statute-of-limitations grounds. Adams appeals.4
    3
    Adams sued Zimmer US, Inc., Zimmer Holdings, Inc.,
    Zimmer, Inc., and Zimmer Surgical, Inc. We refer to all the
    defendants collectively as “Zimmer.”
    4
    The District Court had diversity jurisdiction under 28 U.S.C.
    § 1332 and we have jurisdiction over Adams’s timely appeal
    under 28 U.S.C. § 1291. Like the District Court, we apply
    Pennsylvania law in this diversity jurisdiction case. See
    
    Debiec, 352 F.3d at 128
    . “We exercise plenary review over a
    district court’s grant of summary judgment and apply the same
    6
    II.
    A.
    In Pennsylvania, a prospective plaintiff has two years to
    bring a design defect claim like Adams’s. See 42 Pa. Cons.
    Stat. § 5524(2). The two-year statute of limitations generally
    begins to run “when an injury is inflicted.” Wilson v. El-Daief,
    
    964 A.2d 354
    , 361 (Pa. 2009). But “where the plaintiff’s injury
    or its cause was neither known nor reasonably ascertainable,”
    the “discovery rule” tolls the statute of limitations. Nicolaou v.
    Martin, 
    195 A.3d 880
    , 892 (Pa. 2018); Fine v. Checcio, 
    870 A.2d 850
    , 858 (Pa. 2005). The discovery rule accordingly
    protects parties who are reasonably unaware of latent injuries
    or suffer from injuries of unknown etiology. 
    Nicolaou, 195 A.3d at 892
    & n.13; 
    Fine, 870 A.2d at 858
    .
    Under the Pennsylvania discovery rule, the
    “commencement of the limitations period is grounded on
    ‘inquiry notice’ that is tied to ‘actual or constructive
    knowledge of at least some form of significant harm and of a
    factual cause linked to another’s conduct, without the necessity
    of notice to the full extent of the injury, the fact of actual
    negligence, or precise cause.’” Gleason v. Borough of Moosic,
    
    15 A.3d 479
    , 484 (Pa. 2011) (quoting 
    Wilson, 964 A.2d at 364
    ).
    The statute of limitations accordingly begins to run when the
    plaintiff knew or, exercising reasonable diligence, should have
    known (1) he or she was injured and (2) that the injury was
    caused by another. See Coleman v. Wyeth Pharms., 
    6 A.3d 502
    ,
    standard as the district court; i.e., whether there are any
    genuine issues of material fact such that a reasonable jury could
    return a verdict for the plaintiffs.” 
    Id. at 128
    n.3.
    7
    510–11 (Pa. Super. Ct. 2010). That “reasonable diligence”
    standard is an objective one, but at the same time “sufficiently
    flexible” to “take into account the differences between persons
    and their capacity to meet certain situations and the
    circumstances confronting them at the time in question.” 
    Fine, 870 A.2d at 858
    (internal citation omitted); see also 
    Nicolaou, 195 A.3d at 893
    . Plaintiffs generally will not be charged with
    more medical knowledge than their doctors or health care
    providers have communicated to them. See 
    Wilson, 964 A.2d at 365
    . A plaintiff bears the burden of showing her reasonable
    diligence. 
    Nicolaou, 195 A.3d at 893
    .
    “The balance struck in Pennsylvania” between the
    rights of diligent plaintiffs and defendants who should not have
    to face stale claims “has been to impose a . . . limited notice
    requirement upon the plaintiff, but to submit factual questions
    regarding that notice to the jury as fact-finder.” 
    Gleason, 15 A.3d at 485
    . “[T]hat the factual issues pertaining to Plaintiffs’
    notice and diligence are for a jury to decide” is a “well-
    established general rule” in Pennsylvania. 
    Nicolaou, 195 A.3d at 894
    ; see also Carlino v. Ethicon, Inc., 
    208 A.3d 92
    , 104 (Pa.
    Super. Ct. 2019). “The interplay between summary judgment
    principles and application of the discovery rule requires us to
    consider whether it is undeniably clear that [Adams] did not
    use reasonable diligence in timely ascertaining [her] injury and
    its cause, or whether an issue of genuine fact exists regarding
    [her] use of reasonable diligence to ascertain [her] injury and
    its cause.” 
    Gleason, 15 A.3d at 486
    –87. If such an issue of
    diligence or notice exists, it is a jury’s role to resolve it.
    “Where, however, reasonable minds would not differ in
    finding that a party knew or should have known on the exercise
    of reasonable diligence of his injury and its cause, . . . the
    discovery rule does not apply as a matter of law.” Fine, 870
    
    8 A.2d 858
    –59.
    B.
    The central issue in this case is whether a jury could
    conclude Adams reasonably did not discover her injury until
    February 12, 2015, when Dr. Ververeli apprised her of his
    intraoperative finding that her implant had deteriorated and
    emitted metal shards into her hip. The District Court concluded
    there can be no dispute that the information available to Adams
    in her preoperative visits would have put a reasonably diligent
    person on notice of her injury as a matter of law. In reviewing
    that determination at summary judgment we must “view the
    record and draw inferences in a light most favorable to” Adams
    as “the non-moving party.” Debiec v. Cabot Corp., 
    352 F.3d 117
    , 128 n.3 (3d Cir. 2003). Doing so, we cannot conclude that
    summary judgment was appropriate. As in the several
    Pennsylvania Supreme Court cases before this one, the
    question “[w]hether [a plaintiff] should have acted with greater
    diligence to investigate” or otherwise should have known of
    her injury earlier “can only be seen as an issue of fact.”
    
    Gleason, 15 A.3d at 487
    .
    The Pennsylvania Supreme Court has paid particular
    heed to the jury’s role in determining reasonable diligence in
    medical contexts. The cause of a patient’s pain or discomfort
    can be difficult for her to identify, so courts rarely impute
    knowledge as a matter of law. The Court explained that
    principle in Fine v. Checcio, 
    870 A.2d 850
    (Pa. 2005), its
    seminal treatment of the discovery rule in the context of
    etiological uncertainty. There, Fine had experienced facial
    numbness after having his wisdom teeth extracted. His doctor
    advised him the numbness was a normal side-effect of the
    9
    surgery, but the numbness persisted for nearly a year. When
    Fine filed a malpractice claim about two years and one month
    after his wisdom tooth surgery, his doctor successfully
    obtained a summary judgment; the doctor defendant argued the
    limitations period began on the date of the extraction because
    Fine knew his injury—numbness—then. But the Pennsylvania
    Supreme Court disagreed. It held that a reasonable jury could
    understand Fine’s numbness as “indicative of two distinct
    phenomena”—temporary side effect or permanent injury. 
    Id. at 861.
    Because of that factual uncertainty, a jury might
    determine a reasonable person in his position neither knew nor
    should have known of his injury immediately after surgery.
    The Court has continued to emphasize the principle that
    diagnostic uncertainty usually creates a jury question. In
    Wilson v. El-Daief, 
    964 A.2d 354
    (Pa. 2009), for instance, the
    Court held the plaintiff’s immediate suspicion of surgical error
    after surgery did not start the statutory clock as a matter of law
    because her surgeon denied error and the second opinion she
    sought suggested surgical error as only one of several possible
    explanations for her pain. 
    Id. at 365–66.
    See also 
    Gleason, 15 A.3d at 486
    –87 (similar). Most recently, in Nicolaou v. Martin,
    
    195 A.3d 880
    (Pa. 2018), the Court affirmed that principle:
    Nicolaou was bitten by a tick in 2001 and immediately sought
    a Lyme disease test; though her symptoms persisted, that test,
    and three others administered over the next half dozen years,
    all came back negative. She eventually saw a fifth healthcare
    provider in 2009, who diagnosed her with probable Lyme
    disease and recommended an advanced test. Nicolaou initially
    declined to pay for the test for financial reasons, but ultimately
    took it in February 2010. That test confirmed she had Lyme
    disease. The Court held that Nicolaou—who brought suit about
    two years after the February 2010 test—should be able to
    10
    present her case for reasonable diligence to a jury. 
    Id. at 894–
    95.
    Like the plaintiffs in these Pennsylvania Supreme Court
    cases, Adams has maintained that she acted with reasonable
    diligence yet did not discover her injury until February 2015.
    Adams’s claim here is that she did not know the nature of her
    injury or that it was the deterioration of the Zimmer implant,
    rather than her reaction to the implant, that was the cause. Just
    as a jury could find the plaintiff in Fine ascribed his pain to
    temporary post-operative numbness, so a jury could reasonably
    conclude Adams ascribed her pain to her own poor adjustment
    to the implant; it was only when her doctor discovered new
    information “intraoperatively” that she would know the
    implant’s disintegration, rather than her reaction to the implant,
    was causing her pain. App’x 238.
    To be sure, Pennsylvania’s discovery rule asks only
    when Adams knew she was injured and that her injury was
    caused by another. For the statute of limitations to start, she
    “need not know that [the] defendant’s conduct is injurious.”
    
    Wilson, 964 A.2d at 363
    . But that limitation on the
    requirements for notice was developed in order to hold
    plaintiffs to a standard of reasonable diligence: it operates to
    bar a claim where “the plaintiff has failed to exercise diligence
    in determining injury and cause by another, but has limited
    relevance in scenarios in which the plaintiff has exercised
    diligence but remains unaware of either of these factors.” 
    Id. Zimmer does
    not dispute that Adams investigated her claim in
    coordination with Dr. Ververeli, see Oral Arg. Recording at
    26:03–26:48, and a factfinder could reasonably determine that
    Adams had exercised reasonable diligence. This strongly
    counsels against determining notice as a matter of law.
    11
    Pennsylvania Supreme Court precedent further
    illustrates that while the discovery rule does not require the
    patient to have “a precise medical diagnosis” to start the statute
    of limitations, “a lay person is only charged with the
    knowledge communicated to him or her by the medical
    professionals who provided treatment and diagnosis.”
    
    Nicolaou, 195 A.3d at 893
    ; see also 
    Wilson, 964 A.2d at 365
    .
    Adams has offered evidence that Dr. Ververeli himself did not
    know her injury and its cause until he was in the middle of
    operating on her hip in February 2015. Dr. Ververeli testified
    that his understanding of the injury and its cause fundamentally
    changed “intraoperatively,” App’x 238: he began the operation
    planning to repair and replace the socket of the implant, which
    he expected had worn down with Adams’s use, but the socket
    was in fine shape. He instead discovered the implant hip itself
    was corroding into Adams’s hip and causing her harm. Before
    that revision surgery, Dr. Ververeli expected Adams was
    adjusting poorly because “the longevity of the plastic [was]
    wearing out” around the plastic-lined socket; as to the implant
    and surrounding hip, he expected “normal appearance.” App’x
    235. But once he began operating, Dr. Ververeli realized
    Adams’s hip looked unlike the “many hip revisions [he had
    done] in [his] career.” App’x 235. He testified: “[W]hen I
    opened up Marilyn’s hip what became very abundant in this
    reaction, it almost looked like debris where her muscle should
    be as kind of replaced with this very friable, very fragile
    membrane that had a vascularity to it.” App’x 235. Having seen
    the interior of Adams’s hip, he formed the opinion that her
    “adverse local tissue reaction [was] secondary,” i.e., not caused
    by her body’s poor adjustment, but instead “a reaction to the
    [Zimmer implant].” App’x 238. He agreed that the corrosion
    and fretting that make up her injury were not, and could not, be
    12
    “detect[ed] until the time of the revision when the implant
    [was] visible.” App’x 241.
    A reasonable jury could accept Dr. Ververeli’s
    conception of the injury and cause changed during the revision
    surgery. And if Dr. Ververeli did not realize a problem with the
    implant was injuring Adams until the revision surgery, under
    Pennsylvania law Adams too cannot be charged with that
    constructive knowledge. Reasonable jurors could accordingly
    find Adams, though she knew she had trouble adjusting to her
    implant, could reasonably not have known that the implant
    itself was the cause of her injury.
    In response, Zimmer points to various facts to contend
    Adams had constructive or actual knowledge of her injury.
    Though these facts are all relevant to a jury’s determination of
    knowledge and reasonable diligence, none of them support
    imputing knowledge as a matter of law.
    First, Zimmer asserts Adams’s awareness that the
    revision surgery would replace the Zimmer femoral head with
    another brand of implant put her on actual or constructive
    notice that the implant caused her injury. As Zimmer points
    out, Adams testified that she would have objected had her
    doctor proposed to replace the femoral head with another
    Zimmer product. See App’x 167 (Adams Deposition) (“It just
    seemed that something was wrong. It had to come out.”).5 But
    5
    The Dissent finds this statement necessarily represents actual
    knowledge of injury and cause on Adams’s part. For the
    reasons discussed below, Adams’s recognition that she had a
    problem adjusting to her implant does not necessarily mean she
    knew the Zimmer device, rather than her own reaction to it,
    13
    Nicolaou illustrates how a plaintiff’s after-the-fact recollection
    of general suspicions does not start the statutory clock as a
    matter of law. There, the Pennsylvania Supreme Court
    reversed the lower court’s grant of summary judgment on
    Nicolaou’s February 2012 medical negligence claim,
    reasoning that even though a medical professional diagnosed
    her with probable Lyme disease in July 2009, a reasonable jury
    may believe she should not be charged with discovering her
    injury until February 2010, when she formally received
    positive Lyme disease test 
    results. 195 A.3d at 884
    –85, 894.
    The Court reached this conclusion despite recognizing a
    Facebook post in which Nicolaou, after receiving her 2010
    diagnosis, stated she had told everyone she had Lyme disease
    “for years” and her previous doctors “ignored” her. 
    Id. at 885,
    887. Similarly, in Wilson the plaintiff’s after-the-fact testimony
    that she knew at an earlier point “something is wrong
    here[, s]omething is really wrong” did not start the statutory
    clock as a matter of 
    law. 964 A.2d at 358
    . The Court reasoned:
    “Recognizing that the testimony provides substantial support
    for Appellees’ position in the fact-finding inquiry, we conclude
    that it does not unambiguously establish notice of injury and
    cause, particularly in light of other portions of the testimony.”
    
    Id. at 366.
            Here, too, Adams has pointed to other parts of her
    testimony and the record that a reasonable juror could credit.
    Adams emphasizes that, like the plaintiffs in Nicolaou and
    Wilson, she had a “difficult” diagnostic history that counsels
    was the cause of her pain. We need not determine which is the
    better understanding of her statement because the only
    question for our review is whether reasonable minds could
    understand it, and the rest of the facts, differently. As the two
    opinions in this case illustrate, they could.
    14
    against quickly charging her with knowledge of an injury.
    App’x 228. She moreover had confronted the possibility of her
    implant being replaced once before, during her 2012–13
    struggle with infection; the implant was ultimately left in place,
    which could lead a reasonable person in her position to believe
    surgery calling for removal did not mean the device itself was
    causing her harm. Adams also asserts, and Dr. Ververeli
    confirms, that she was extremely distraught in the time leading
    up to the revision surgery, and a jury could understand her
    aversion to a Zimmer replacement in this light: she was in pain,
    so she wanted the device “to come out” without linking her
    pain to a problem with the device. App’x 167. And ultimately,
    a jury could reasonably credit her assertion that she then
    believed she had a bad reaction to the device without yet
    understanding she had an injury “caused by another party’s
    conduct.” 
    Nicolaou, 195 A.3d at 892
    .
    Second, Zimmer contends that Dr. Ververeli, his staff,
    and various pre-surgery paperwork actually notified Adams on
    January 30, 2015 and February 9, 2015 that she was suffering
    from “metallosis” and an “adverse tissue reaction” in advance
    of the operation. Under Pennsylvania law, however,
    knowledge of medical terminology like “metallosis” and
    “adverse tissue reaction” is not sufficient to impute
    constructive knowledge. See 
    Coleman, 6 A.3d at 518
    (“[A]
    reasonable person [could] conclude that Ms. Coleman was
    confused and uncertain about the significance of the fact that
    her cancer was ‘estrogen positive.’ . . . A jury could reasonably
    find that Dr. Webb’s comment that Ms. Coleman’s breast
    cancer was ‘estrogen receptor positive’ did not constitute
    notice to her that the etiology of her cancer was the HRT
    medications.”). At any rate, Dr. Ververeli’s testimony that he
    did not know Adams had an injury caused by the implant until
    15
    the revision surgery shows his “metallosis” diagnosis could not
    have communicated the pertinent understanding of injury or
    cause to Adams.6
    While a jury may ultimately credit Zimmer’s contention
    that Adams knew or should have known about her injury at
    some point before the February 2015 revision surgery, Adams
    has raised factual issues of notice and knowledge that
    Pennsylvania law requires a jury to resolve.
    III.
    Because factual disputes remain concerning application
    of the discovery rule, we will reverse and remand for further
    proceedings.
    6
    Zimmer also asserts that Adams’s signed surgical consent
    form from February 9, 2015 is independent evidence that she
    had actual notice of injury by that date. But because the consent
    form simply repeats the information Adams heard on her
    January 30 preoperative visit, that argument rises and falls with
    Zimmer’s other factual challenges. Like the rest of the facts it
    points to, the February 9 consent form can be presented as
    evidence to a jury but does not, as a matter of law, establish
    actual notice.
    16
    GREENAWAY, JR., Circuit Judge, dissenting.
    Pain is an overwhelming force in the human experience.
    When one is in pain, the predominant thoughts are: “How and
    when will this pain go away? Just get rid of the pain!”
    Appellant Marilyn Adams (“Adams”) was sadly overwhelmed
    with right hip pain. What was the source? Her hip prosthesis.
    When was it apparent to her? Unfortunately for her, days
    before she asserts—indeed, days before her hip revision
    surgery. As such, she brought this action too late, since she
    knew of her right hip pain and its connection to the allegedly
    defective prosthesis before her surgery. Pennsylvania’s
    discovery rule therefore does not save her cause. Because I
    cannot steer clear of these facts, I cannot join my friends in the
    Majority. I thus dissent.
    I. BACKGROUND
    After Adams began experiencing right hip pain in 2008,
    she underwent total right hip replacement surgery at the hands
    of Dr. Prodromos Ververeli (“Dr. Ververeli”) on January 18,
    2011. During the surgery, Dr. Ververeli replaced Adams’s
    natural right hip with a Zimmer M/L Taper Kinectiv Stem and
    Neck and Versys Femoral Head (the “Zimmer Device”), a hip
    prosthesis manufactured by Appellees Zimmer US, Inc.;
    Zimmer Holdings, Inc.; Zimmer, Inc.; and Zimmer Surgical,
    Inc. (collectively, “Zimmer”). For some time after the surgery,
    Adams did well.
    But, by September 21, 2012, Adams began
    experiencing right hip pain again. Over the course of the next
    three years, Adams met with Dr. Ververeli several times. After
    pursuing and eliminating several potential causes for the pain,
    Dr. Ververeli eventually concluded that she was suffering from
    1
    metallosis—metal wear from the Zimmer Device that was
    causing an adverse reaction to the surrounding tissue. On
    January 30, 2015, Dr. Ververeli shared his unequivocal
    conclusion with Adams. On that same day, Adams decided,
    based on Dr. Ververeli’s recommendation, to undergo hip
    revision surgery to replace the Zimmer Device with another hip
    prosthesis manufactured by a different company. On February
    9, 2015, Adams signed an informed consent form for the
    surgery, which indicated that Dr. Ververeli’s final diagnosis
    was indeed metallosis.
    Three days later, on February 12, 2015, Dr. Ververeli
    successfully performed the hip revision surgery on Adams.
    During the surgery, Dr. Ververeli replaced the Zimmer Device
    with a ceramic device manufactured by a different
    manufacturer. The surgery corroborated Dr. Ververeli’s final
    preoperative diagnosis of metallosis, though he uncovered
    even more corrosion of the Zimmer Device during the surgery
    than he initially had imagined. Shortly after the surgery, Dr.
    Ververeli discussed his surgical findings with Adams. A little
    under two years later, on February 10, 2017, Adams filed the
    instant product liability action against Zimmer.
    2
    II. PENNSYLVANIA’S DISCOVERY RULE1
    As the Majority correctly notes, Pennsylvania law
    proscribes a two-year statute of limitations on the claims before
    us. See 42 Pa. Cons. Stat. § 5524(2). Although the two-year
    period typically begins to run once an injured party suffers an
    injury, see Fine v. Checcio, 
    870 A.2d 850
    , 857 (Pa. 2005), the
    discovery rule provides a limited exception, tolling the statute
    of limitations in certain cases involving latent injury or an
    inapparent causal connection, see Wilson v. El-Daief, 
    964 A.2d 354
    , 361 (Pa. 2009).
    But, even in such cases, Pennsylvania’s discovery rule
    only tolls the statute of limitations until the injured party has
    “actual or constructive knowledge of at least some form [(1)]
    of significant harm and [(2)] of a factual cause linked to
    another’s conduct, without the necessity of notice of the full
    extent of the injury, the fact of actual negligence, or precise
    cause.” Gleason v. Borough of Moosic, 
    15 A.3d 479
    , 484 (Pa.
    2011) (quoting 
    Wilson, 964 A.2d at 364
    ); see Debiec v. Cabot
    Corp., 
    352 F.3d 117
    , 132 (3d Cir. 2003) (noting that an
    “unrebutted suspicion” of an injury caused by another is
    sufficient to trigger the statute of limitations in Pennsylvania).
    The injured party also need not know “the precise medical
    cause of her injury,” that “her physician was negligent,” or that
    1
    Since this case arises under diversity jurisdiction, we apply
    Pennsylvania substantive law. Under Erie R. Co. v. Tompkins,
    
    304 U.S. 64
    , 78 (1938), our task is thus to predict how the
    Supreme Court of Pennsylvania would rule if it were deciding
    this case. See Norfolk S. Ry. Co. v. Basell USA Inc., 
    512 F.3d 86
    , 91–92 (3d Cir. 2008).
    3
    “she has a cause of action” for the limitations period to begin.
    
    Wilson, 964 A.2d at 364
    n.10 (citations omitted).
    Importantly, Pennsylvania intentionally crafted its
    discovery rule to be narrow, placing a heavy burden on the
    injured party invoking the rule. See 
    id. at 364
    (reviewing the
    two major “approaches to determining accrual for limitations
    purposes” in other jurisdictions and formulating its own
    discovery rule to reflect the “narrower” one); see also 
    Gleason, 15 A.3d at 484
    (“Pennsylvania’s formulation of the discovery
    rule reflects a narrow approach ‘to determining accrual for
    limitations purposes’ and places a greater burden upon
    Pennsylvania plaintiffs vis-á-vis the discovery rule than most
    other jurisdictions.” (citing 
    Wilson, 964 A.2d at 364
    )).
    The injured party thus bears the burden of proof.
    
    Wilson, 964 A.2d at 362
    . To toll the statute of limitations, the
    injured party must demonstrate that, even through the exercise
    of reasonable diligence, she was unable to determine that she
    suffered an injury that was causally linked to the conduct of
    another. See Cochran v. GAF Corp., 
    666 A.2d 245
    , 250 (Pa.
    1995). Reasonable diligence requires the injured party to
    exhibit “those qualities of attention, knowledge, intelligence[,]
    and judgment which society requires of its members for the
    protection of their own interest and the interest of others.”
    
    Fine, 870 A.2d at 858
    (quoting Crouse v. Cyclops Indus., 
    745 A.2d 606
    , 611 (Pa. 2000)).
    Indeed, determining when the injured party knew or
    should have known that she was injured by another party’s
    conduct is a fact-intensive inquiry ordinarily for a jury to
    decide. 
    Wilson, 964 A.2d at 362
    . But the Supreme Court of
    Pennsylvania has importantly noted that “courts may resolve
    the matter at the summary judgment stage where reasonable
    4
    minds could not differ on the subject.” Id. (citing 
    Fine, 870 A.2d at 858
    –59, and 
    Cochran, 666 A.2d at 248
    ).
    III. THE MAJORITY’S MISSTEPS
    Since Adams filed this lawsuit on February 10, 2017,
    her claims are only timely if they accrued on or after February
    10, 2015. In my view, the District Court correctly determined
    that Adams’s claims accrued as a matter of law by January 30,
    2015—when Dr. Ververeli informed Adams she was
    experiencing metallosis from the Zimmer Device.2 Today, in
    holding that factual issues bar summary judgment, the Majority
    errs in three chief respects: (A) it overlooks or undervalues
    undisputed material facts, (B) it misapplies the appropriate
    legal standard, and (C) it relies on inapposite cases. I address
    each error in turn.
    A. Oversight of Undisputed Material Facts
    The Majority erroneously concludes that reasonable
    minds could disagree as to when the statute of limitations
    began chiefly by overlooking material facts. Most damningly,
    Adams admitted in her deposition that she knew by January 30,
    2015 that her injury was causally linked to the Zimmer Device.
    When asked about her state of mind on that date when Dr.
    Ververeli recommended that the Zimmer Device be replaced,
    Adams responded: “It just seemed that something was wrong.
    [The Zimmer Device] had to come out. . . . It was a problem.”
    App. 167. Inherent to her concession that she knew then that
    2
    Indeed, this certainly more than meets the “unrebutted
    suspicion” standard our jurisprudence reflects. 
    Debiec, 352 F.3d at 132
    .
    5
    there was a problem with the Zimmer Device that required its
    removal is the notion that she connected her injury to Zimmer’s
    conduct. That is all the second element of Pennsylvania’s
    narrow discovery rule demands. See 
    Gleason, 15 A.3d at 484
    (requiring only knowledge of “some form . . . of a factual cause
    linked to another’s conduct, without necessity of notice of the
    . . . precise cause” (citation omitted)). By her own words, then,
    Adams confirmed that she satisfied this element, thereby
    beginning the statute of limitations, on January 30, 2015. On
    its own, this concession is game, set, and match.
    How, then, does the Majority conclude that reasonable
    minds could disagree about when the statute of limitations
    began to run? First, the Majority attempts to undermine the
    dispositive nature of Adams’s concession by chopping it up
    and unreasonably focusing on a mere portion of it in isolation.
    See Maj. Op. 13 & n.5 (curiously omitting any mention of
    Adams’s testimony that she knew on January 30, 2015 that the
    Zimmer Device itself was a problem).
    Then, and more broadly, the Majority harps at length on
    what are ultimately immaterial facts. For example, the
    Majority asserts that Adams’s testimony that she would have
    objected had Dr. Ververeli proposed to replace the Zimmer
    Device with another Zimmer product, see App. 167, does not
    definitively mean she knew that the Zimmer Device caused her
    injury. See Maj. Op. 13–14. But that is beside the point. In
    light of Adams’s concession from moments prior to that
    testimony, it does not matter whether or why she wanted to
    replace the Zimmer Device with another manufacturer’s
    product. Indeed, by the time Adams made this comment, she
    had already admitted that on January 30, 2015 she knew there
    was a problem with the Zimmer Device that was causing her
    pain and thus required its removal. That conceded knowledge
    6
    is more than sufficient for her claims to have accrued on that
    date. Reasonable minds could not disagree.
    The Majority also dwells over whether Dr. Ververeli
    clearly explained to Adams that his final diagnosis of
    metallosis indicated some connection between her injury and
    the Zimmer Device. See 
    id. at 15
    (stating that knowledge of
    medical terminology “is not sufficient to impute constructive
    knowledge” (citation omitted)). But this is both immaterial,
    considering Adams’s concession, and incorrect, since Dr.
    Ververeli indeed informed Adams that his metallosis diagnosis
    implicated the Zimmer Device as the cause of her right hip
    pain. During his deposition, Dr. Ververeli defined “metallosis”
    as being “metal wear that then causes a reaction to the
    surrounding tissues.” App. 218. He further clarified that, by
    January 30, 2015, he had not only informed Adams about the
    metallosis diagnosis, but also explained that this meant she was
    suffering from “adverse local tissue reaction from wear and
    fretting to the [Zimmer Device],” which would necessitate
    “revision [surgery] and chang[ing the Zimmer Device to a
    prosthesis with a] ceramic head” to “correct the problem.” 
    Id. at 256–57.3
    By January 30, 2015, then, Adams had actual or
    3
    Adams’s deposition testimony creates no doubt as to Dr.
    Ververeli’s testimony. When asked whether Dr. Ververeli
    notified her on January 30, 2015 that she was experiencing
    metallosis, for example, Adams responded that she “[did not]
    remember.” 
    Id. at 166.
    Lack of memory, however, does not
    establish a genuine dispute at this summary judgment stage.
    Cf. Lexington Ins. Co. v. W. Pa. Hosp., 
    423 F.3d 318
    , 333 (3d
    Cir. 2005). In any event, Adams’s inability to recall some
    things does not undermine her damning concession discussed
    previously.
    7
    constructive knowledge that her right hip pain was a reaction
    to—and thus being caused, at least in part, by—the presence of
    the Zimmer Device, thereby triggering the statute of
    limitations.
    Further, whether Adams’s prior diagnostic history was
    “unclear” or “difficult,” as the Majority characterizes it, e.g.,
    Maj. Op. 4 (citation omitted), is of no moment. Why? That is
    because, by January 30, 2015, Dr. Ververeli had meticulously
    eliminated all other potential diagnoses through various tests,
    scans, and procedures and given Adams a single, unequivocal
    diagnosis of metallosis. See App. 258. By that point, not only
    was Dr. Ververeli’s diagnosis clear, but it was also correct, as
    the findings during the surgery further supported.
    Finally, that the revision surgery uncovered even more
    corrosion from the Zimmer Device than initially anticipated is
    also of no significance because the surgery still only
    corroborated Dr. Ververeli’s preoperative diagnosis that
    Adams’s pain was originating from a reaction to the metal in
    the Zimmer Device. Indeed, as discussed more fully later,
    Pennsylvania law explicitly instructs us not to consider in our
    analysis the extent of Adams’s injury, which undoubtedly
    corresponds to the extent of the metal wear uncovered in her
    surgery. See 
    Gleason, 15 A.3d at 484
    . In sum, then, Adams’s
    claims accrued by January 30, 2015, by which point even she
    concedes that she knew that her injury was causally linked to
    Zimmer’s conduct. All reasonable minds properly viewing all
    of the undisputed, material facts would have to agree.
    B. Misapplication of Legal Standard
    In applying the relevant legal standard, the Majority
    inappropriately heightens the bar for when the statute of
    8
    limitations is triggered under Pennsylvania’s discovery rule. In
    doing so, it primarily violates two central principles outlined
    by the Supreme Court of Pennsylvania: for claims to accrue
    under the discovery rule, an injured party (1) need only know
    about some form of significant harm, not the full extent of her
    injury; and (2) need only know about a causal link between her
    injury and another’s conduct, not misconduct.
    1. Some Form of Significant Harm, Not Full Extent of Injury
    Much of the Majority’s position rests on its claim that
    Dr. Ververeli did not fully appreciate the Zimmer Device’s
    deterioration until he was in the midst of Adams’s surgery. But
    the Majority’s attempt to characterize Dr. Ververeli’s
    preoperative diagnosis and postoperative knowledge as being
    “fundamentally” different, Maj. Op. 12, cannot save the day.
    That is because the surgery simply verified Dr.
    Ververeli’s prior diagnosis. If anything, during the surgery,
    Dr. Ververeli only discovered corrosion of the Zimmer Device,
    and resulting adverse reactions in Adams’s nearby muscle
    tissue, beyond that which he was already expecting and had
    parlayed to Adams. See App. 235 (Dr. Ververeli’s stating that
    his surgery revealed “abundant . . . reaction” to the extensive
    corrosion of the Zimmer Device in Adams’s nearby “soft
    tissue”). That, however, is of no moment in our analysis
    because the Supreme Court of Pennsylvania instructs us to only
    consider whether an injured party has notice of “at least some
    form of significant harm,” not “the full extent of the injury.”
    
    Gleason, 15 A.3d at 484
    (quoting 
    Wilson, 964 A.2d at 364
    ).
    Here, Adams had such notice before the surgery given Dr.
    Ververeli’s correct preoperative diagnosis.
    9
    Relatedly, to the extent the Majority asserts that Dr.
    Ververeli’s preoperative diagnosis was somehow incorrect due
    to the extensive corrosion he uncovered during Adams’s
    surgery, that, too, is irrelevant. That is because Pennsylvania’s
    discovery rule only requires that an injured party know of
    “some form of . . . factual cause link[ing her injury] to
    another’s conduct,” not “the precise medical cause of her
    injury.” 
    Wilson, 964 A.2d at 364
    & n.10 (citations omitted).
    At core, whether Dr. Ververeli made new discoveries while
    conducting Adams’s surgery, his preoperative diagnosis of
    metallosis—metal wear that causes a reaction to the
    surrounding tissues—still correctly put Adams on notice that
    her injury was causally connected to the Zimmer Device—the
    only metal in her right hip. That is all Adams needed to know
    to satisfy the discovery rule’s second element. 4
    Perhaps unintentionally, even the Majority admits that
    the crux of Dr. Ververeli’s new findings during the surgery was
    merely that the Zimmer Device was corroding even more than
    previously imagined. See Maj. Op. 12 (stating that Dr.
    Ververeli “began the operation . . . expect[ing that the socket
    of the Zimmer Device] had worn down . . . but [also]
    discovered the [Zimmer Device] itself was corroding”). In
    fact, Adams also concedes this. See Appellant’s Br. 32 (stating
    4
    The Majority’s obsession with the “debris” Dr. Ververeli
    found during the revision surgery is likewise misplaced
    because Dr. Ververeli has clarified that “fretting and metal
    wear debris . . . are very similar,” as they are both “types of
    corrosion,” which he already expected before the surgery.
    App. 218. By focusing on this, then, the Majority is simply on
    an intellectual—but ultimately irrelevant—frolic.
    10
    that, during the surgery, Dr. Ververeli saw “a lot more [tissue]
    reaction” than he expected (citation omitted)).
    Dr. Ververeli’s own testimony crystallizes this point.
    During his deposition, Dr. Ververeli confirmed that, “[p]rior to
    conducting th[e] revision surgery,” his “definitive diagnosis”
    was that Adams was “suffering from an adverse local tissue
    reaction to the [Zimmer Device],” which he had previously
    defined as metallosis. App. 238. When also asked whether,
    “after [he] performed th[e] revision procedure . . . [he] was able
    to formulate [the] opinion as to whether . . . Adams was
    suffering from an adverse local tissue reaction,” he answered
    in the affirmative. 
    Id. In other
    words, the surgery just
    confirmed what Dr. Ververeli predicted, and expressed to
    Adams, before the surgery.
    In sum, then, the undisputed material facts before us
    demonstrate that Dr. Ververeli’s preoperative diagnosis
    remained unchanged after Adams’s surgery. The only new
    intraoperative discovery was the extent to which the Zimmer
    Device corroded and Adams’s nearby muscle tissue had thus
    adversely reacted. Hence, by hanging its hat on developments
    that merely go to “the full extent of [Adams’s] injury,” the
    Majority flouts Pennsylvania law. 
    Gleason, 15 A.3d at 484
    (quoting 
    Wilson, 964 A.2d at 364
    ).
    2. Causal Link Between Injury and Another’s Conduct, Not
    Misconduct
    The Majority also errs in that it inappropriately focuses
    on whether Adams knew that the Zimmer Device was flawed
    in some respect. Most strikingly, the Majority’s own words
    indicate that its analysis turns on whether Adams, through Dr.
    Ververeli, “realize[d] a problem with the [Zimmer Device] was
    11
    injuring” her. Maj. Op. 13. But that is not what Pennsylvania’s
    discovery rule demands for claims to accrue. Instead, the
    discovery rule hinges on whether the injured party has
    knowledge of a causal link between her injury and “another
    party’s conduct,” not misconduct—i.e., negligence. 
    Gleason, 15 A.3d at 484
    (quoting 
    Wilson, 964 A.2d at 364
    ). Put
    differently, the question is not whether Adams was on notice
    of a problem with the Zimmer Device—i.e., a design defect—
    but rather whether she was on notice of her problem—her right
    hip pain—relating to the Zimmer Device. Here, she was.
    Even the Majority concedes this articulation of the legal
    standard. See Maj. Op. 11 (“For the statute of limitations to
    start, [Adams] ‘need not know that [the] defendant’s conduct
    is injurious.’” (second alteration in original) (citation
    omitted)); see also, e.g., 
    Wilson, 964 A.2d at 362
    (“[T]he fact
    that a plaintiff is not aware that the defendant’s conduct is
    wrongful, injurious[,] or legally actionable is irrelevant to the
    discovery rule analysis[.]” (citing Burton–Lister v. Siegel,
    Sivitz and Lebed Assoc., 
    798 A.2d 231
    , 237 (Pa. Super. 2002)).
    But the Majority nonetheless corrupts the standard in its
    application.
    In particular, the Majority attempts to use the reasonable
    diligence requirement as a sword that somehow pierces
    Pennsylvania’s binding and timeworn articulation of the
    discovery rule. As the Majority apparently sees it, that “a
    factfinder could reasonably determine that Adams had
    exercised reasonable diligence . . . strongly counsels against
    determining notice as a matter of law.” Maj. Op. 11. The
    Majority reaches this erroneous conclusion because, in
    explaining the rationale behind the reasonable diligence
    requirement, one case once mentioned that the rule that a
    plaintiff need not know that the defendant’s conduct was
    12
    wrongful “has limited relevance in scenarios in which the
    plaintiff has exercised diligence but remains unaware of [the
    injury and causation] factors.” Maj. Op. 11 (citation omitted).
    But this reasonable diligence discussion is a red herring
    here. By its plain terms, the language the Majority cites only
    contemplates a plaintiff’s diligence possibly alleviating
    application of the discovery rule’s causation element where,
    despite her diligence, she remains unaware of the causal link
    between her injury and the defendant’s conduct. Adams,
    however, had such knowledge here, evidenced chiefly by her
    admission that she knew by January 30, 2015 that the Zimmer
    Device “was a problem” and thus “had to come out” of her
    right hip. App. 167. Thus, that Adams may have investigated
    her claim with reasonable diligence does not “strongly
    counsel[] against determining notice as a matter of law,” as the
    Majority erroneously concludes. Maj. Op. 11. Instead,
    whether Adams was reasonably diligent has no bearing on this
    particular analysis because, by the time of her surgery, she had
    satisfied both elements of Pennsylvania’s discovery rule, thus
    triggering the statute of limitations.
    C. Reliance on Inapposite Cases
    Finally, the Majority erroneously relies on cases
    inapplicable here. In asserting that this case must go to a jury,
    the Majority gloms onto an array of cases also sent to juries—
    but none of which are analogous to ours. That is because those
    cases involved (1) multiple or uncertain causes or (2) incorrect
    diagnoses. By contrast, Dr. Ververeli here had given Adams a
    single, correct diagnosis for her injury by January 30, 2015.
    13
    1. Multiple or Uncertain Causes
    The Majority supports its proclamation that “diagnostic
    uncertainty usually creates a jury question” by turning to a
    handful of cases, including Fine, Wilson, Gleason, and Carlino
    v. Ethicon, Inc., 
    208 A.3d 92
    (Pa. Super. Ct. 2019). Maj. Op.
    10. But each of those cases concerned plaintiffs who were
    given multiple or uncertain causes for their injuries by their
    medical providers. See 
    Fine, 870 A.2d at 861
    ; 
    Wilson, 964 A.2d at 365
    ; 
    Gleason, 15 A.3d at 487
    ; 
    Carlino, 208 A.3d at 106
    . Although the Majority properly notes that Adams
    previously had a “difficult diagnostic history,” Maj. Op. 14
    (internal quotation marks and citation omitted), by the time of
    Adams’s January 30, 2015 office visit, Dr. Ververeli had
    thoroughly eliminated all of the other potential causes for her
    injury and given her a single, unequivocal diagnosis of
    metallosis, see App. 258 (Dr. Ververeli’s affirming that on
    “January 30, 2015” he “confirmed that [Adams] was suffering
    from metallosis”). As a result, Fine, Wilson, Gleason, and
    Carlino are all inapposite.
    2. Incorrect Diagnoses
    Lastly, the Majority’s reliance on Nicolaou v. Martin,
    
    195 A.3d 880
    (Pa. 2018), is misplaced for at least two reasons.
    First, and most notably, unlike the many incorrect diagnoses
    the plaintiff in Nicolaou had previously received, 
    id. at 895,
    Dr. Ververeli’s final preoperative diagnosis of metallosis was
    correct. Second, prior to receiving the positive test result that
    verified her malady, the Nicolaou plaintiff had only received a
    “probable”—not final—diagnosis from her medical provider.
    14
    
    Id. at 884.5
    Here, in contrast, Dr. Ververeli “confirmed” to
    Adams on January 30, 2015 “that she was suffering from
    metallosis.” App. 258. The correct, final nature of Dr.
    Ververeli’s diagnosis critically distinguishes it from the
    Nicolaou medical provider’s “probable” diagnosis. 
    Nicolaou, 195 A.3d at 884
    . These two features render Nicolaou
    inapplicable to our case.
    IV. CONCLUSION
    While our legal system aims to give all their day in
    court, a plaintiff must comply with the rules. Here, any
    sympathies for her properly put aside, Adams did not. The
    undisputed material facts indicate that her claims are time-
    barred by Pennsylvania’s applicable statute of limitations.
    Even drawing all inferences in Adams’s favor, no reasonable
    mind could conclude otherwise. I thus dissent.
    5
    That correct diagnosis only became final when the plaintiff
    received the positive test result. Importantly, the Supreme
    Court of Pennsylvania never questioned that, even under the
    discovery rule, the Nicolaou plaintiff’s claims would have
    accrued at the latest when she received the correct, final
    diagnosis of her disease.
    15