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Ciliary Body Melanoma is a type of cancer arising from the coloured part (uvea) of the eye. About 12% of uveal melanoma arise from the ciliary body. ==Clinical features== It occurs most commonly in the sixth decade. * External signs include dilated episcleral blood vessels (''sentinel vessels''). Extraocular erosion may produce a dark mass beneath the conjunctiva. * Pressure on the lens by the enlarging tumor can cause astigmatism, sublaxtion of the lens and formation of a localised lens opacity. * The tumor can erode forward through the iris root and mimic an iris melanoma. * Retinal detachment can be rarely caused by posterior extension of the tumor. * Anterior uveitis is an uncommon presentation and occurs due to tumor necrosis. * Cirumferentially growing tumors carry a bad prognosis as they are diagnosed late. * At times the tumor is detected as an incidental finding during routine examination. The tumour is usually diagnosed by clinical examination with a slit-lamp utilising a triple mirror contact lens. Ultrasonography and fine needle aspiration biopsy (FNAB) are also sometimes helpful in confirming the diagnosis. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ciliary body melanoma」の詳細全文を読む スポンサード リンク
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