Jean Casimir Félix Guyon

Jean Casimir Félix Guyon was a French surgeon and urologist, born in 1831 in Saint-Denis on the island of Bourbon, now Réunion. He studied medicine in Paris and received his doctorate in 1858, was appointed a physician of the Paris hospitals in 1864, and became professor of surgical pathology in 1877 and of genitourinary surgery in 1890 at the University of Paris. He entered the Académie de Médecine in 1878. His clinics at the Hôpital Necker were attended by students from around the world, and his Leçons cliniques sur les maladies des voies urinaires of 1881 became a standard text. In 1907 he joined urologists from Europe, the United States and South America in founding the Association Internationale d'Urologie. Although he is known mainly for genitourinary anatomy and surgery, he is credited with describing the ulnar canal at the wrist, now called Guyon's canal; his name also survives in Guyon's isthmus, Guyon's sign and Guyon's urethrotome. He died in 1920, and a hospital in Saint-Denis, Réunion, bears his name.