- A dictionary of medical eponyms

Chvostek's sign (František Chvostek)

Related people

Facialis phenomenon. Clinical sign of the presence of a mechanical hyperirritability of the peripheral nerves, particularly demonstrated in percussion of the nervus facialis. Tapping the face over the facial nerve in front of the tragus of the ear causes spasm of facial muscles, typically a twitch of the nose or lips. Seen in tetany and sometimes in anxiety states.


  • F. Chvostek:
    Beitrag zur Tetanie. Wiener medizinische Presse, 1876, 17: 1201-1203, 1225-1227, 1253-1258, 1313-1316. Nathan Weiss described "his" sign in: Centralblatt für die gesammte Therapie, 1883, 1: 9.

What is an eponym?

An eponym is a word derived from the name of a person, whether real or fictional. A medical eponym is thus any word related to medicine, whose name is derived from a person.

What is Whonamedit?

Whonamedit.com is a biographical dictionary of medical eponyms. It is our ambition to present a complete survey of all medical phenomena named for a person, with a biography of that person.


Whonamedit? does not give medical advice.
This survey of medical eponyms and the persons behind them is meant as a general interest site only. No information found here must under any circumstances be used for medical purposes, diagnostically, therapeutically or otherwise. If you, or anybody close to you, is affected, or believe to be affected, by any condition mentioned here: see a doctor.