Key Takeaway
Russell v Cornell University: unchanged prior neck findings, an unsupported aggravation opinion, and the causation proof needed on the motion.
This article is part of our ongoing causation coverage, with 178 published articles analyzing causation issues across New York State. Attorney Jason Tenenbaum brings 24+ years of hands-on experience to this analysis, drawing from his work on more than 1,000 appeals, over 100,000 no-fault cases, and recovery of over $100 million for clients throughout Nassau County, Suffolk County, Queens, Brooklyn, Manhattan, and the Bronx. For personalized legal advice about how these principles apply to your specific situation, contact our Long Island office at (516) 750-0595 for a free consultation.
In Russell v Cornell University, the medical records showed an ongoing neck condition before the latest collision. The plaintiff’s doctors did not explain objectively what that collision changed.
Last reviewed: September 2026.
Legal Update (September 2026): Laws of 2026, chapter 58, Part EE sections 1 and 4 removed the 90/180-day serious-injury category for actions and proceedings commenced on or after May 26, 2026; the ruling below applied the earlier statute.
The comparison the court required
In Russell v Cornell University, 110 AD3d 1236 (3d Dept 2013), decided October 17, 2013, the Third Department reversed the order and dismissed the complaint.
Free Consultation · No Fee Unless We Win
Does this apply to your situation?
Every case is different. Get a free, confidential case review from an experienced attorney who can tell you exactly where you stand.
The plaintiff had received ongoing treatment after two earlier collisions with deer. The defense presented her records and testimony, unchanged neck complaints and C6–7 MRI findings, and an IME opinion finding no causal relationship to the later parking-space collision. That evidence satisfied its initial burden.
Two plaintiff physicians attributed worsening to the latest accident. Their reports, however, relied on her account of increased symptoms without objective evidence distinguishing the earlier condition from the claimed later injury. The court found that response insufficient.
Aggravation still needs an explanation
The court considered the exacerbation theory and found its medical support lacking. Pommells v Perez, 4 NY3d 566 (2005) explains why supported evidence of degeneration or an earlier injury requires a medical response.
For the CPLR 3212(b) record, the useful comparison is the patient’s condition before and after the accident and the doctor’s explanation of any change. A bare conclusion of aggravation does not supply that missing reasoning.
Jason’s original comment
Jason’s original 2013 reaction follows.
A very interesting discussion on how causation is analyzed.
Connect to the Encyclopedia
See the pre-existing injury and causation encyclopedia hub for the topic’s case directory and statutory update.
- Vargas: before-and-after knee MRIs and a triable causal issue
- Sanchez: different causation results for different body parts
- McDonald: speculative causal proof after a jury verdict
- Campbell: unanswered shoulder findings and treatment cessation
For review of a particular injury or no-fault dispute, contact the office.
Legal Context
Why This Matters for Your Case
New York law is among the most complex and nuanced in the country, with distinct procedural rules, substantive doctrines, and court systems that differ significantly from other jurisdictions. The Civil Practice Law and Rules (CPLR) governs every stage of civil litigation, from service of process through trial and appeal. The Appellate Division, Appellate Term, and Court of Appeals create a rich and ever-evolving body of case law that practitioners must follow.
Attorney Jason Tenenbaum has practiced across these areas for over 24 years, writing more than 1,000 appellate briefs and publishing over 2,353 legal articles that attorneys and clients rely on for guidance. The analysis in this article reflects real courtroom experience — from motion practice in Civil Court and Supreme Court to oral arguments before the Appellate Division — and a deep understanding of how New York courts actually apply the law in practice.
About This Topic
Causation in New York Personal Injury & No-Fault Law
Causation — proving that the defendant's negligence or the accident caused the plaintiff's injuries — is an essential element of every personal injury and no-fault claim. New York courts distinguish between proximate cause, intervening causes, and pre-existing conditions that may have been aggravated by an accident. The legal standards for establishing causation through medical evidence and the defenses available to challenge causal connection are analyzed in depth across these articles.
178 published articles in Causation
Keep Reading
More Causation Analysis
IME no-show is a policy defense triggering the hourly attorney fee provision
Learn how IME no-show defenses trigger hourly attorney fee provisions in NY no-fault insurance. Court rules failure to attend IME is policy defense.
May 22, 2021
Contractual deemer
New York courts examine when out-of-state insurers can avoid no-fault coverage obligations through contractual deemer provisions and policy language analysis.
Apr 24, 2021
Documentation shows wrong insurance carrier was sued
Court ruling shows defendant successfully proved wrong insurance carrier was sued using claims manager's affidavit, potentially breaking from precedent requiring underwriter...
Sep 9, 2013
Broke the chain of causation
New York appellate court ruling demonstrates how a patient's failure to follow medical instructions can break the chain of causation in malpractice cases.
May 1, 2010
Pre-Existing Injuries in New York Personal Injury Cases: What You Need to Know
Learn how pre-existing conditions affect NY personal injury cases. Expert legal guidance for Long Island accidents. Call 516-750-0595 for free consultation.
Mar 20, 2019
UM Hearing – evidence insufficient to prove presence of coverage
UM hearing case where petitioner failed to prove vehicle identification and insurance coverage at accident time - insufficient evidence under NY law.
Apr 18, 2016Was this article helpful?
Disclaimer: This article is published by the Law Office of Jason Tenenbaum, P.C. for informational and educational purposes only. It does not constitute legal advice, and no attorney-client relationship is formed by reading this content. The legal principles discussed may not apply to your specific situation, and the law may have changed since this article was last updated.
New York law varies by jurisdiction — court decisions in one Appellate Division department may not be followed in another, and local court rules in Nassau County Supreme Court differ from those in Suffolk County Supreme Court, Kings County Civil Court, or Queens County Supreme Court. The Appellate Division, Second Department (which covers Long Island, Brooklyn, Queens, and Staten Island) and the Appellate Term (which hears appeals from lower courts) each have distinct procedural requirements and precedents that affect litigation strategy.
If you need legal help with a causation matter, contact our office at (516) 750-0595 for a free consultation. We serve clients throughout Long Island (Huntington, Babylon, Islip, Brookhaven, Smithtown, Riverhead, Southampton, East Hampton), Nassau County (Hempstead, Garden City, Mineola, Great Neck, Manhasset, Freeport, Long Beach, Rockville Centre, Valley Stream, Westbury, Hicksville, Massapequa), Suffolk County (Hauppauge, Deer Park, Bay Shore, Central Islip, Patchogue, Brentwood), Queens, Brooklyn, Manhattan, the Bronx, Staten Island, and Westchester County. Prior results do not guarantee a similar outcome.
