Intraorbital Abducens Nerve Schwannoma

Intraorbital Abducens Nerve Schwannoma- A Case Report

“…6,7 The abducens nerve runs on the medial surface of the lateral rectus muscle and innervates the middle third of the muscle with an average of three small branches entering the muscle. 8,9 The schwannomas arising from the sensory branches of trigeminal nerve are located in superior and medial quadrants of orbit. The schwannomas arising from the motor nerves usually arise at their respective myoneural junction.…”

“…16 The schwannoma can be approached by lateral or superior orbitotomy. 8,13 Superior orbitotomy provides direct access to superior, medial and lateral quadrants of orbit to ensure safe and complete excision of the lesions. The nerve attachment at the myoneural junction has to be visualised to preserve the integrity of the nerve.…”

Primary intraocular ancient schwannoma: A case report and review of the literature

“…In some cases, the patient presents with sinusitis . Cystic changes within these lesions are frequent findings . In most cases, a true capsule formed by perineural tissue surrounds the lesion, and its intactness and lack of invasion provide histologic confirmation of complete excision…”

Orbital Abducens Nerve Schwannoma: A Case Report and Review of the Literature

“… 3) Intraorbital abducens nerve schwannomas are extremely rare, with a search of the English literature identifying only four cases of intraorbital abducens nerve schwannoma. 1 , 3 – 5) We report a case of orbital schwannoma arising from the terminal branch of the abducens nerve.…”

“…Three clinical forms may present: localized schwannoma; in association with neurofibroma (as part of von Recklinghausen syndrome); or as schwannomatosis. 1) Schwannoma is seen predominantly in cranial nerve VIII.…”