question mark ear

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question mark ear2017-07-03T21:02:18+00:00

question mark ear

question mark ear image from New Medical Terms

question mark ear deformity

ENT, PLASTIC SURGERY

A descriptive term for a malformation of the external ear defined by the presence of a cleft between the lower part of the helix and the lobule* which was fancifully likened by an early author to a question mark…the name stuck.

*The lobe is relatively laterally recessed compared to the upper portion of the ear.

Where found It may occur as an sporadic anomaly or occur in question mark ears—isolated (OMIM:612798) which is caused by a mutation of EDN1, the gene that encodes endothelin 1

Variations From small notch to complete separation of the helix from the lobe; uni- or bilateral; scapha may be absent

Differential diagnosis Cleft helix—cleft is within the helix.

Synonyms Constricted ear, Cosman ear 

References http://omim.org/entry/612798

http://elementsofmorphology.nih.gov/index.cgi?tid=cffbc3de49dbb172

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