A 12-year-old girl had an inferior penetrating corneal injury of the left eye with retained intraocular lashes on the iris surface. The corneal wound was self-sealed. Nine days after trauma, she underwent intraocular lash removal via a temporal corneal incision. Five months later, she developed a white, fluffy mass on the superolateral part of the iris with an adjacent pearl cyst without anterior chamber reaction (Figure 1). Differential diagnoses included inclusion cyst, foreign body, and iris tumor. The mass was removed and a sector iridectomy was performed. Histopathological examination results indicated a dermoid cyst (Figure 2A-C). The white, fluffy mass was made up of flakes of acellular eosinophilic material, consistent with keratin (Figure 2D). We found no recurrence at a 6-month follow-up examination (Figure 3).
Tulvatana W, Chantranuwat C, Mahasuvirachai K, Amaranuntakit S. Free Keratin and Dermoid Cyst of the Iris. Arch Ophthalmol. 2005;123(3):402-403. doi:10.1001/archopht.123.3.402