Kos v. Muzykansky — affirmed a medical-malpractice verdict over causation and trial-error challenges

Case
Todd Kos, Individually and as Independent Administrator of the Estate of Patricia Kos, Deceased v. Eugene Muzykansky, M.D., and Adult Primary Care Center, Ltd.
Court
Illinois Appellate Court, First Judicial District, Fifth Division
Judge
Mitchell (appointment info not available)
Date Decided
July 31, 2026
Docket No.
1-24-2359
Topics
Medical Malpractice; Proximate Cause; Expert Testimony; Trial Evidence
Source
Read the full opinion

Background

Patricia Kos, age 67, saw Dr. Eugene Muzykansky for an unscheduled visit after experiencing diarrhea, blood in the toilet, weight loss, and low blood pressure. Muzykansky diagnosed several gastrointestinal conditions and an anal fissure, prescribed treatment, stopped her blood-pressure medication, and instructed her to return in four days. He did not send her to a hospital.

Kos died the next day from a gastrointestinal hemorrhage caused by a duodenal ulcer associated with cancer. Her son, Todd Kos, brought wrongful-death and survival claims against Muzykansky and his practice. Plaintiff’s experts testified that Muzykansky should have recognized signs of bleeding and sent Kos to a hospital, where blood products and emergency procedures could have controlled the hemorrhage and permitted diagnosis and treatment of the cancer. A jury found for the plaintiff, and the circuit court denied defendants’ requests for judgment notwithstanding the verdict or a new trial.

The Court’s Holding

The appellate court affirmed. It held that the plaintiff presented sufficient expert testimony linking Muzykansky’s failure to send Kos to the hospital with her lost chance of survival. An internal-medicine expert identified the signs that required urgent hospital evaluation, while a surgical-oncology expert described the specific hospital interventions that could have controlled the bleeding and testified that Kos would have survived the hemorrhage and cancer. That evidence did not leave a fatal causation gap.

The court rejected the argument that testimony from an emergency-medicine physician or gastroenterologist was indispensable. Unlike cases in which experts deferred the critical treatment decision to an absent specialist, the plaintiff’s expert explained the measures that could have prevented the fatal hemorrhage. The jury also could reasonably infer that an urgent hospital referral would have resulted in treatment before Kos died the following morning.

The court further held that defendants were not entitled to a new trial based on hearsay, criticism of medical recordkeeping, cross-examination of defense witnesses, or photographs showing blood in Kos’s apartment. Limiting instructions reduced any hearsay prejudice; several cross-examination objections were forfeited or concerned damages rather than liability; and the photographs were probative of Kos’s pain and suffering and her son’s mental suffering. Individually and cumulatively, the challenged rulings did not deny defendants a fair trial.

Key Takeaways

  • A medical-malpractice plaintiff may establish causation without testimony from every specialist who might participate in treatment when qualified experts identify the specific interventions that would have prevented the injury.
  • The plaintiff’s experts supplied a sufficient causal chain from the failure to order urgent hospital care, through available measures to control the hemorrhage, to Kos’s lost chance of survival.
  • Potentially graphic photographs may be admitted when their probative value on conscious pain, suffering, and wrongful-death damages is not substantially outweighed by unfair prejudice.

Why It Matters

The decision clarifies that Illinois courts evaluate the substance of causation testimony rather than imposing a categorical requirement for testimony from a particular specialty. A claimed “missing link” is not fatal when the testifying experts explain what timely treatment would have occurred and how it would have changed the outcome.

The opinion also illustrates the substantial deference afforded trial judges in managing evidence and cross-examination. Even in a lengthy medical-malpractice trial, minor or mitigated errors will not justify a new trial unless their individual or cumulative effect caused substantial prejudice.

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