Steven-I.-Hajdu was born in Hungary. After the failed anticommunist uprising in 1956, he escaped from Hungary and obtained his MD from the University of Louvain, Belgium, in 1961, cum laude. Doctor Hajdu came to the United States as a political refugee. After four years of residency in pathology at various hospitals, he was offered a fellowship in surgical pathology at the Memorial Sloan Kettering Cancer Center in New York, and was appointed as Attending Pathologist, and Chief of Cytology combined with a professorship in pathology at Cornell University School of Medicine. In 1991, he relocated to Long Island and became Chief of Surgical Pathology and Cytopathology at the North Shore University Hospital, Manhasset, with an attached appointment as a professor in pathology at New York University School of Medicine. Doctor Hajdu authored four books on soft tissue and bone sarcomas and published more than 400 articles, including 72 on medical history, in medical periodicals.