Joseph Fraumeni Jr., Who Identified Li-Fraumeni Syndrome, Dies at 93

Joseph Fraumeni Jr. died on June 22 at age 93. He spent a half-century at the National Cancer Institute, where his research identified a rare inherited cancer syndrome. Fraumeni began his career after a pre-med visit to Massachusetts General Hospital left him queasy during an abdominal operation, prompting him to abandon plans to become a surgeon.

He completed a residency at Memorial Sloan Kettering Cancer Center, where a senior physician noted his interest in puzzling cases and steered him toward epidemiology. In the late 1960s, Fraumeni and Frederick Pei Li examined the case of a 23-year-old father with leukemia and his 10-month-old son with soft-tissue sarcoma.

They reviewed hospital records and death certificates nationwide and found multiple cancers across generations in the family.

The pair published a 1969 paper hypothesizing an unidentified familial syndrome. A 1990 discovery confirmed that an inherited p53 gene mutation caused the cancers. The condition was later named Li-Fraumeni syndrome.

Fraumeni’s name appears on more than 900 scientific papers, including several co-authored while in his 90s. In retirement he helped found the Li-Fraumeni Syndrome Association. Lawrence Ingrassia, whose family carries the syndrome, first met Fraumeni in March 2020 and later wrote a 2024 book on the research.