Vestibular Schwannoma Presenting as a White Middle Ear Mass Behind an Intact Tympanic Membrane

Tinnitus as a Symptom of Transotic Schwannoma

“…That leads to conclusion, that transotic schwannoma extends via the round window into the middle ear [4,12]. Extension through the oval window is less likely due the mechanical barrier of the stapes [4,13]. In our study CT scan showed extension of the described lesion through the round window, without bone destruction.…”

“…The bone of the otic capsule is very hard. That leads to conclusion, that transotic schwannoma extends via the round window into the middle ear [4,12]. Extension through the oval window is less likely due the mechanical barrier of the stapes [4,13].…”

“…Middle ear is an extremely rare but possible place of occurrence of the neoplasm. Transotic schwannoma have been previously reported in the literature only in ten patients [3,4]. Only in three of the subjects AS extended from the inner ear to the middle ear, and was not present in the CPA.…”

Pale Mass behind Intact Tympanic Membrane: An Otologic Puzzle to Solve

“…3 A vestibular schwannoma though rare could also present in a similar way. 4 Some postulate that the tumors are of intralabyrinthine in origin and extend medially toward the cerebellopontine angle and laterally into the middle ear via the round window. 5 Other neurogenic tumors like facial nerve schwannoma and Jacobson's nerve schwannoma also form middle ear masses, albeit rarely.…”

Soft tissue middle ear mass

“…An annual growth rate of 1-2 mm is expected, but up to 75% of tumors show no growth [1]. Lateral expansion into the middle ear through breach of the otic capsule and round window is a rare finding [2]. These tumors may also originate from the inner ear [3], and the Kennedy classification system addresses this type [4].…”