Causation and Pre-Existing Conditions: The Knee Surgery Dismissal in Campbell v Fischetti

Key Takeaways

• In Campbell v Fischetti, the First Department dismissed a serious injury claim because the plaintiff’s surgeon connected her knee surgery to the accident based on nothing more than her own account.
• A same-day X-ray showing only a contusion — alongside chronic degenerative changes and severe medial joint space narrowing — gave the defense contemporaneous proof that the later surgery addressed arthritis, not trauma.
• A plaintiff with a pre-existing condition must come forward with objective evidence of injuries different from the pre-existing condition.
• Expert causation opinions that rest solely on a patient’s subjective history will not defeat summary judgment under Insurance Law § 5102(d).

Personal injury cases in New York often hinge on establishing a clear causal connection between an accident and claimed injuries. This becomes particularly challenging when plaintiffs have pre-existing medical conditions that complicate the analysis. The decision in Campbell v Fischetti demonstrates how courts scrutinize medical evidence when determining whether an accident truly caused subsequent medical treatment, especially when objective signs of continuing disability are absent.

The case illustrates a common scenario where immediate post-accident medical records may actually work against a plaintiff’s claim. When initial medical examinations reveal only minor injuries while later surgical interventions are attributed to pre-existing conditions, establishing the necessary causal link becomes nearly impossible without compelling objective evidence.

The Decision

Campbell v Fischetti, 2015 NY Slip Op 01898 (1st Dept. 2015)

“Furthermore, an X ray taken on the accident date revealed that plaintiff had sustained only a contusion, and had chronic degenerative changes with severe medial joint space narrowing.

In opposition, plaintiff failed to raise a triable issue of fact. Her orthopedic surgeon diagnosed her with left knee osteoarthritis before and after surgery, and provided “no objective basis or reason, other than the history provided by plaintiff,” in support of his opinion that the accident was causally related to the knee surgery nine months later (see Farmer at 562). Moreover, plaintiff failed to provide evidence of any injuries that were different from her preexisting arthritic condition (see Kamara v Ajlan, 107 AD3d 575, 576).”

The Serious Injury Framework

Article 51 of the Insurance Law — New York’s no-fault threshold statute — bars recovery for non-economic loss in most motor vehicle cases unless the plaintiff sustained a “serious injury” as defined in Insurance Law § 5102(d). The statute lists discrete categories, including fracture, significant limitation of use of a body function or system, and permanent consequential limitation of use of a body organ or member.

On a threshold motion, the defendant carries the initial burden of demonstrating, through competent medical evidence, that the plaintiff did not sustain a serious injury causally related to the accident. Once the defendant points to degenerative findings in the plaintiff’s own records or imaging, the burden shifts: the plaintiff must produce objective medical evidence addressing the degeneration and tying the claimed injuries to the crash. A surgeon’s say-so, built on the patient’s narrative alone, does not carry that burden.

One housekeeping note for newer cases: New York’s May 27, 2026 auto tort reform legislation eliminated the 90/180-day serious-injury category and added a greater-than-50% fault bar for Article 51 actions commenced on or after the effective date. We covered the amendments here. Campbell’s causation logic applies with equal force under the amended statute.

Pre-Existing Conditions and the Causation Gap

Degenerative changes are the defense bar’s favorite finding for a reason. Osteoarthritis, joint space narrowing, and disc desiccation develop over years; an X-ray or MRI showing them on the day of the accident strongly suggests the condition predated the crash. In Campbell, the day-of-accident X-ray did double duty — it showed the acute injury was a mere contusion and documented “severe” pre-existing narrowing of the medial joint space.

That left the plaintiff’s surgeon in an impossible position. He diagnosed osteoarthritis both before and after the operation, and the only thread connecting the surgery to the accident nine months earlier was what the patient told him. The First Department treats that kind of opinion as speculation, not evidence. The plaintiff needed something objective — comparative imaging, contemporaneous quantified range-of-motion deficits, findings distinct from the arthritic picture — and had none.

Why This Matters for Plaintiffs and Defense Counsel

For injured plaintiffs, the lesson is to build the causation record early. Gaps in treatment, a benign emergency room workup, and imaging that shows only degeneration are the raw material of a defense threshold motion. A treating physician who intends to causally relate later surgery to the accident must explain, in objective terms, why the trauma — and not the underlying condition — necessitated the procedure, and must squarely address the degenerative findings.

For defense counsel and carriers, Campbell confirms that the plaintiff’s own records are often the strongest exhibit. Day-of-accident imaging and initial hospital records frequently undercut the claimed mechanism of injury, as we have seen where a plaintiff’s own hospital records defeated his threshold motion.

Practice Pointers

• Get the day-one records. The accident-date X-ray decided this case. Always obtain and read the initial imaging and ER chart before briefing causation.
• Attack (or shore up) the basis of the expert opinion. An opinion resting “on the history provided by plaintiff” is a conclusion, not proof.
• Address degeneration head-on. A plaintiff’s expert who ignores documented degenerative findings invites summary judgment; one who explains why the limitations are traumatic in origin may survive it.
• Mind the treatment timeline. Surgery nine months post-accident, with arthritis diagnosed before and after, demands a documented bridge between the two events.

Without objective evidence of injuries different from the pre-existing condition, cases like this fail at the summary judgment stage.

Frequently Asked Questions

Can I recover for a knee injury in New York if I already had arthritis?

Yes, but you must prove the accident caused an injury different from — or a measurable worsening of — the pre-existing arthritis. Objective medical evidence, such as comparative imaging or quantified limitations attributable to trauma, is essential. A doctor’s opinion based only on your account of the accident is not enough.

What counts as objective medical evidence of causation?

Courts look for diagnostic findings that do not depend on the patient’s self-report: imaging showing acute (not degenerative) pathology, contemporaneous quantified range-of-motion testing, and physician findings that distinguish traumatic injury from a chronic condition.

Why was the surgeon’s opinion rejected in Campbell v Fischetti?

The surgeon diagnosed osteoarthritis both before and after the surgery and admitted his causation opinion rested on “no objective basis or reason, other than the history provided by plaintiff.” Under First Department precedent, an opinion grounded solely in the patient’s narrative cannot raise a triable issue of fact.

Related Resources

• Pre-Existing Injuries in New York Personal Injury Cases: What You Need to Know — the firm’s cluster hub on this defense
• The firm’s Legal Encyclopedia
• Our personal injury practice
• Causation not proved
• Causation speculative
• Proof that the injury was pre-existing was not refuted