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Medical Term:

fissula ante fenestram


minute, slitlike passage in the otic labyrinthine wall anterior to the oval window to the vestibule. The bone around it often contains fibrous tissue and immature cartilage. It is a site with a predilection for otosclerosis and for some perilymphatic fistulae.

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.