Eccrine porocarcinoma of the upper eyelid.

Eccrine porocarcinoma is an unusual, locally aggressive tumor with a significant risk of metastasis and recurrence after surgical excision. Eyelid involvement is rare. We describe a 70-year-old man who was examined for right upper eyelid eccrine porocarcinoma that was treated with Mohs surgery. Eccrine porocarcinoma should be considered in the differential diagnosis of malignant eyelid tumors.