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Updated: Jul 18, 2026
Surgical Treatment of an Endolymphatic Sac Tumor
Published on: May 26, 2023
Ciliary body schwannoma successfully treated by local resection
Hiroshi Goto1, Hideki Mori2, Shiroaki Shirato2
1Department of Ophthalmology, Tokyo Medical University, Tokyo, Japan. goto1115@tokyo-med.ac.jp.
Background:
Schwannoma arising from the ciliary body is a rare intraocular neoplasm, and most cases previously reported were diagnosed histopathologically after eyeball enucleation because of a diagnosis of ciliary body melanoma.
Case:
A case of ciliary body schwannoma was dissected locally.
Observations:
A 19-year-old woman was referred to us with a diagnosis of iris cyst. Local resection of the tumor was performed because of deteriorated visual acuity caused by displacement of the lens. In histopathological analysis, the encapsulated tumor showed a proliferation of the spindle cells with no atypia, and in immunohistochemical analysis, tumor cells were positive for S-100 protein; these findings were compatible with schwannoma. Visual acuity improved postoperatively, and no complications or recurrence have been observed in the 4 years since surgery.
Conclusions:
Schwannoma should be considered in the differential diagnosis of a ciliary body tumor.