Jean Casimir Félix Guyon
Encyclopedia
Jean Casimir Félix Guyon (21 July 1831 – 2 August 1920) was a French surgeon
and urologist born on Ile-Bourbon (Réunion
).
He studied medicine in Paris
, receiving his doctorate in 1858. He was appointed médecin des hôpitaux in 1864, and was later a professor of surgical pathology
(from 1877) and genitourinary surgery (from 1890) at the University of Paris
. In 1878 he became a member of the Académie de Médecine. At Hôpital Necker he held clinics that were attended by students worldwide
Guyon was the first professor of urology
in Paris, and in 1907, he along with urologists from Europe, the United States and South America established the Association Internationale d'Urologie.
Although he was primarily known for work with genitourinary anatomy
, Guyon is credited with the discovery of the ulnar canal
at the wrist. This canal channels blood vessels and the ulnar nerve
from the forearm to the hand, and is now known as Guyon's canal
. Ulnar nerve compression at this location is sometimes referred to as Guyon's tunnel syndrome
. Another eponymous anatomical term is Guyon's isthmus, an elongated constriction of the junction of the body and cervix
.
Surgeon
In medicine, a surgeon is a specialist in surgery. Surgery is a broad category of invasive medical treatment that involves the cutting of a body, whether human or animal, for a specific reason such as the removal of diseased tissue or to repair a tear or breakage...
and urologist born on Ile-Bourbon (Réunion
Réunion
Réunion is a French island with a population of about 800,000 located in the Indian Ocean, east of Madagascar, about south west of Mauritius, the nearest island.Administratively, Réunion is one of the overseas departments of France...
).
He studied medicine in Paris
Paris
Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...
, receiving his doctorate in 1858. He was appointed médecin des hôpitaux in 1864, and was later a professor of surgical pathology
Pathology
Pathology is the precise study and diagnosis of disease. The word pathology is from Ancient Greek , pathos, "feeling, suffering"; and , -logia, "the study of". Pathologization, to pathologize, refers to the process of defining a condition or behavior as pathological, e.g. pathological gambling....
(from 1877) and genitourinary surgery (from 1890) at the University of Paris
University of Paris
The University of Paris was a university located in Paris, France and one of the earliest to be established in Europe. It was founded in the mid 12th century, and officially recognized as a university probably between 1160 and 1250...
. In 1878 he became a member of the Académie de Médecine. At Hôpital Necker he held clinics that were attended by students worldwide
Guyon was the first professor of urology
Urology
Urology is the medical and surgical specialty that focuses on the urinary tracts of males and females, and on the reproductive system of males. Medical professionals specializing in the field of urology are called urologists and are trained to diagnose, treat, and manage patients with urological...
in Paris, and in 1907, he along with urologists from Europe, the United States and South America established the Association Internationale d'Urologie.
Although he was primarily known for work with genitourinary anatomy
Anatomy
Anatomy is a branch of biology and medicine that is the consideration of the structure of living things. It is a general term that includes human anatomy, animal anatomy , and plant anatomy...
, Guyon is credited with the discovery of the ulnar canal
Ulnar canal
The ulnar canal or ulnar tunnel, also called Guyon's canal, is a space at the wrist between the pisiform bone and the hamate bone through which the ulnar artery and the ulnar nerve travel into the hand.-Eponym:...
at the wrist. This canal channels blood vessels and the ulnar nerve
Ulnar nerve
In human anatomy, the ulnar nerve is a nerve which runs near the ulna bone. The ulnar collateral ligament of elbow joint is in relation with the ulnar nerve. The nerve is the largest unprotected nerve in the human body , so injury is common...
from the forearm to the hand, and is now known as Guyon's canal
Ulnar canal
The ulnar canal or ulnar tunnel, also called Guyon's canal, is a space at the wrist between the pisiform bone and the hamate bone through which the ulnar artery and the ulnar nerve travel into the hand.-Eponym:...
. Ulnar nerve compression at this location is sometimes referred to as Guyon's tunnel syndrome
Guyon's canal syndrome
Guyon's canal syndrome, sometimes referred to as Handlebar palsy, is caused by entrapment of the ulnar nerve in the Guyon canal as it passes through the wrist....
. Another eponymous anatomical term is Guyon's isthmus, an elongated constriction of the junction of the body and cervix
Cervix
The cervix is the lower, narrow portion of the uterus where it joins with the top end of the vagina. It is cylindrical or conical in shape and protrudes through the upper anterior vaginal wall...
.