Ring-Shaped Leiomyoma of the Ciliary Body.

PURPOSE: Ciliary body mesectodermal leiomyoma is a rare, benign smooth muscle tumor that typically presents in women in the second to fourth decade of life. The diagnosis is typically based on clinical color, funduscopic appearance, transillumination properties, and B-scan ultrasonography. METHODS: We present a patient with a 360° ciliary body mass with transillumination and ultrasonographic properties consistent with a ring melanoma. RESULTS: This case emphasizes the difficulty in differentiating the benign leiomyoma from similar appearing malignant tumors such as melanoma. CONCLUSION: The eye was enucleated and the diagnosis was ring-shaped leiomyoma.