 Following World War II, she returned to work at the New York Infirmary and also at the Memorial Sloan-Kettering Cancer Center, where she described the twelve cases of what was then known as juvenile melanoma and recognized that these lesions have benign behavior despite their microscopic resemblance to melanoma.This clinically important information came to be published in the "American Journal of Pathology" in 1948, and the lesion now bears her name.At 46 years of age, Spitz died from colon cancer, before the term Spitz nevus was popularised.