Thomas Stephen Cullen (born 1868, date of death unknown) was an American gynecologist, born at Bridgewater, Ont. He was educated at the Toronto Collegiate Institute and the University of Toronto. He became associated with Johns Hopkins Hospital College and was made a professor of clinical gynecology at the latter and visiting gynecologist to the hospital. He wrote alone, and in collaboration, four important monographs:

• Cancer of the Uterus (1900)
• Adenomyoma of the Uterus (1908)
• Myomata of the Uterus, with Howard Atwood Kelly (1909)
• Diseases of the Umbilicus (1916)

Term

• Cullen's sign — discoloration of the skin about the umbilicus, regarded as a sign of ruptured extra-uterine pregnancy

Dorland's Medical Dictionary (1938)