An Unusual Case of Epidermal Iris Cyst

We report an unusual case of an iris cyst with a white mass in the anterior chamber (AC). The diagnosis of epidermal cyst was confirmed histopathologically. A 24-year-old man visited us for a white mass in the AC of his right eye. The cornea had been injured and sutured 2 years before. Nine months before, an iris cyst had been diagnosed at a local hospital and treated by YAG laser photoablation, but the white mass continued growing. On presentation to our institution, the eye was asymptomatic. Uncorrected visual acuity (VA) was 20/32, corrected VA was 20/20, and intraocular pressure was 12 mmHg. Slit-lamp microscopic examination showed a white, coral-like mass protruding from the iris surface to the edge of the pupil approximately at 5 o'clock. An iris cyst was apparent adjacent to the white mass (; available at http://aaojournal.org). The pupil was nearly round, the lens was clear, and no abnormality was found on fundus examination. Ultrasound biomicroscopic examination demonstrated the coral-appearing mass (A; available at http://aaojournal.org) and iris cyst (B). The mass was abutting the corneal endothelial layer.