Docteur Jean Casimir F幨ix Guyon (July 21, 1831 - August 2, 1920) was a French surgeon and urologist who was born on Ile-Bourbon (R徼nion). He studied medicine in Paris and received his doctorate in 1858. He was a surgeon at H皫ital Necker and a professor in Paris. In 1890 he became the first Professor of Urology in Paris. In 1907 Guyon and a handful of other urologists established the International Association of Urology. Although he was primarily known for work with genitourinary anatomy, Guyon is credited with the discovery of the ulnar canal at the wrist, which is now known as Guyon's canal. Ulnar nerve compression at this location is sometimes referred to as Guyon's tunnel syndrome. Another anatomical term is Guyon's isthmus, an elongated constriction of the junction of the body and cervix. ?007 TopFoto