fossula post fenestram

fossula post fenestram

the small passage posterior to the oval window from the middle ear to the vestibule filled with connective tissue; a site of predilection for otosclerosis and some perilymphatic fistulae.

fos·su·la post fe·nes·tram

(fos'yū-lă pōst fĕ-nes'trăm)
The small passage filled with connective tissue posterior to the oval window of the cochlea; a site of predilection for otosclerosis.