Rare persistent kerato-acanthoma of left lower eyelid: a case report.

A 45-year-old man presented with a mass in left lower eyelid. On examination, the mass was diagnosed as kerato-acanthoma. The mass was excised and excision biopsy confirmed the diagnosis. Kerato-acanthoma almost always regress spontaneously within six months. So persistence of the lesion for more than one year is a rare presentation.