Friday, October 5, 2018

Mesoectodermal Leiomyoma of the Ciliary Body

A 47-year-old woman is suspected of having a ciliary body melanoma (A). Histologic sections (B and C) show large ciliary body tumor composed of tumor cells in a fibrillar cytoplasmic matrix. Electron microscopy (D) shows a dense osmophiliic structure known as a skeinoid fiber.

Immunohistochemistry helped to confirm that this was a leiomyoma.

(Case reported by J. Campbell et al. Ultrastruct Pathol 28:559, 1997.)

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