[Heterotopic smooth muscle in the choroid].

A histological and ultrastructural description of a case with an area of smooth muscle in the choroid of both eyes in presented. This was a chance finding in the globes of a deceased female patient whose lids (OU) as well as the conjunctiva and sclera of one side were affected by mycosis fungoides. The heterotopic smooth muscle in the choroid is interpreted as being an isolated malformation in otherwise nondysplastic eyes. It is possible that the rare leiomyomas of the choroid occur in such heterotopias, which have not been observed before.