Case report: Extremely rare case of poroma on the inner canthus

Poromas are benign and slow-growing lesions originating from the sweat glands. They occur in the elderly, without gender predominance. This article describes the rare case of a patient presenting a poroma on the right inner canthus.

An 83-year-old patient presented with a lesion on the right inner canthus, which was thought to be basal cell carcinoma. After the surgical excision and the histological analysis, the lesion turned out to be a poroma, on an extremely rare localization.

Poromas are benign lesions with various presentations, which can turn to be malignant. The malignant form is called porocarcinoma. They are usually situated on the palms or the soles, or in the head and neck area. The diversity of presentations makes diagnosis difficult. Etiology of poromas is currently not well known but could be linked with long-term exposure to radiation or genetical background. There are many ways of treatment which can be used, like laser excision or surgery. In this article, surgery is the method performed, with a curative approach. Cases of poromas have been reported on the eyelid or on the thigh, which are both unusual localizations, but no cases of poroma on the inner canthus have been described, to the best of our knowledge.

A patient presented with a lesion on the right inner canthus, which turned out to be a poroma. She underwent surgery to treat it.