Jean Casimir Félix Guyon (21 July 1831 – 2 August 1920) was a French surgeon and

urologist Urology (from Greek οὖρον ''ouron'' "urine" and '' -logia'' "study of"), also known as genitourinary surgery, is the branch of medicine that focuses on surgical and medical diseases of the urinary-tract system and the reproductive org ...

born in Saint-Denis, Ile-Bourbon ( Réunion). He studied medicine in

Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), ma ...

, receiving his doctorate in 1858. He was appointed ''médecin des hôpitaux'' in 1864, and was later a professor of surgical

pathology Pathology is the study of the causes and effects of disease or injury. The word ''pathology'' also refers to the study of disease in general, incorporating a wide range of biology research fields and medical practices. However, when used in ...

(from 1877) and genitourinary surgery (from 1890) at the

University of Paris , image_name = Coat of arms of the University of Paris.svg , image_size = 150px , caption = Coat of Arms , latin_name = Universitas magistrorum et scholarium Parisiensis , motto = ''Hic et ubique terrarum'' (Latin) , mottoeng = Here and a ...

. In 1878 he became a member of the ''

Académie de Médecine An academy ( Attic Greek: Ἀκαδήμεια; Koine Greek Ἀκαδημία) is an institution of secondary or tertiary higher learning (and generally also research or honorary membership). The name traces back to Plato's school of philosophy ...

''. At Hôpital Necker he held clinics that were attended by students worldwide In 1907, he along with urologists from Europe, the United States and South America established the ''Association Internationale d'Urologie''. In 1979 he was commemorated on a

postage stamp A postage stamp is a small piece of paper issued by a post office, postal administration, or other authorized vendors to customers who pay postage (the cost involved in moving, insuring, or registering mail), who then affix the stamp to the f ...

, issued by France on the occasion of the 18th Congress of the ''Association Internationale d'Urologie'', held in Paris. The Hôpital Félix Guyon, located in

Saint-Denis, Réunion Saint-Denis (, , unofficially Saint-Denis de La Réunion for disambiguation; ) is the prefecture (administrative capital) of the French overseas department and region of Réunion, in the Indian Ocean. It is located at the island's northernmost ...

, is named in his honour. Although he was primarily known for work with

genitourinary The genitourinary system, or urogenital system, are the organs of the reproductive system and the urinary system. These are grouped together because of their proximity to each other, their common embryological origin and the use of common pathw ...

anatomy Anatomy () is the branch of biology concerned with the study of the structure of organisms and their parts. Anatomy is a branch of natural science that deals with the structural organization of living things. It is an old science, having it ...

, Guyon is credited with the discovery of the

ulnar canal The ulnar canal or ulnar tunnel (also known as Guyon's canal or tunnel) is a semi-rigid longitudinal canal in the wrist that allows passage of the ulnar artery and ulnar nerve into the hand. The roof of the canal is made up of the superficial palm ...

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 The ulnar canal or ulnar tunnel (also known as Guyon's canal or tunnel) is a semi-rigid longitudinal canal in the wrist that allows passage of the ulnar artery and ulnar nerve into the hand. The roof of the canal is made up of the superficial pa ...

. Ulnar nerve compression at this location is sometimes referred to as "Guyon's tunnel syndrome".

Additional eponyms

* "Guyon's isthmus": an elongated constriction of the junction of the body and cervix. * "Guyon's sign": ballottement of the

kidney The kidneys are two reddish-brown bean-shaped organs found in vertebrates. They are located on the left and right in the retroperitoneal space, and in adult humans are about in length. They receive blood from the paired renal arteries; blo ...

* "Guyon's urethrotome": a variant of Maisonneuve's urethrotome.

Œuvre écrite

* ''Sur les cavités de l'utérus à l'état de vacuité''. Doctoral thesis; Paris, 1858. * ''Des tumeurs fibreuses de l'utérus''. Concours-thesis, 1860. * ''Des vices de conformation de l'urèthre chez l'homme et les moyens d'y remédier''. Concours-thesis, 1863. * ''Éléments de chirurgie clinique, comprenant le diagnostic chirurgical, les opérations etc''. Paris, 1873. * ''Leçons cliniques sur les maladies des voies urinaires''. Paris, J. B. Baillière, 1881; 2nd edition, 1885; 1084 pages. This book is based on his lectures at the Hôpital Necker in 1876 and 1877. * ''Atlas des maladies des voies urinaires''. Published with Pierre Bazy (1853–1934). Paris : Doin. Book 1–4, 1881–1883. * ''Lecons sur les cystites et sur les prostatiques''. 1888. * ''Leçons cliniques sur les affections chirurgicales de la vessie et de la prostate''. Paris, J. B. Baillière, 1888. * ''Anatomie et physiologie pathologique de la rétention de l’urine''. with

Joaquín Albarrán Joaquín Albarrán, full name Joaquin Maria Albarrán y Dominguez (May 9, 1860 – January 17, 1912) was a Cuban urologist born in Sagua La Grande, Cuba. He received the Order of the Legion of Honour of France. Biography He studied medicine in Hav ...

(1860–1912). (1890).

Honours

Légion d'honneur The National Order of the Legion of Honour (french: Ordre national de la Légion d'honneur), formerly the Royal Order of the Legion of Honour ('), is the highest French order of merit, both military and civil. Established in 1802 by Napoleon ...

: culture.gouv.fr : certificate of the legion of honor (Fr)
/ref> ** Knight in 1868, ** Officer in 1893, ** Commander in 1906 * Officier d'Académie (

Ordre des Palmes Académiques A suite, in Western classical music and jazz, is an ordered set of instrumental or orchestral/ concert band pieces. It originated in the late 14th century as a pairing of dance tunes and grew in scope to comprise up to five dances, sometimes with ...

) in 1869 culture.gouv.fr : award (Fr)
/ref> * Officier de l'Instruction Publique (

) in 1880

References

External links

* {{DEFAULTSORT:Guyon, Jean Casimir Felix 1831 births 1920 deaths People from Saint-Denis, Réunion French urologists French surgeons University of Paris faculty Members of the French Academy of Sciences