Vincent Jules Louis Queyrat (2 December 1856 in Chavanat, Creuse, France – 18 October 1933 in Paris, France)[1] was a French dermatologist and syphilologist who is best remembered for the erythroplasia of Queyrat,[2] a carcinoma in situ of the skin of the penis.[3] From 1898 until 1923, Queyrat was head of the dermatology service of l'Hôpital Ricord, a venereal hospital in Paris, now Hôpital Cochin.