question mark ear
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