Fisch classification of glomus tumor

Fisch classification of glomus tumor

Type A limited to middle ear cleft

Type B limited to tympanomastoid area

Type C involves infralabyrinthine compartment and extended to petrous apex

C1 limited to vertical portion of carotid canal

C2 invades vertical portion

C3 horizontal portion

D1 intracranial extension<2cm

D2 >2cm