Sana Nadeem, Ba Naeem, Amer Yaqub, Fariha Taimur.
Orbital Schwannomas.
Ophthalmol Update Jan ;14(1):17-20.

Schwannomas are encapsulated, benign, slow growing tumors arising from the nerve sheath, which occur rarely in the orbit. The nerves of origin are the trigeminal (ophthalmic or maxillary division) and its branches, oculomotor, trochlear, abducent, and ciliary to name a few. Symptoms depend on their location; causing a mass effect, proptosis, diplopia, or optic nerve dysfunction. We present two unusual cases, both ladies; who ultimately were diagnosed on histopathology. One lady presented with right axial proptosis and optic neuropathy, and underwent excision biopsy via lateral bulbar conjunctival orbitotomy, with preservation of visual function. The other lady presented with a right superomedial sub-brow mass in the region of the supratrochlear nerve, which was completely excised with no recurrence at sixteen months. Schwannomas should be considered in the differential of any well-defined orbital mass, and early diagnosis and surgical excision yields good results.

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