Ronald Dorfman — emeritus professor of pathology at the Stanford University School of Medicine — has died, Stanford says in a press release. He was 89. Dorfman made his mark studying diseases of the lymph nodes and hematopoietic cells, and was celebrated for his diagnostic skill, Stanford says. He also helped to develop the subspecialty of hematopathology, co-founded the Society for Hematopathology in 1981, and was instrumental in developing a classification system for lymphoma, the school adds. According to Stanford, "the physicians’ efforts transformed the once fatal disease into one of the most curable forms of cancer."