Benign eccrine poromas that present as multiple oval, brown-to-black plaques, located mostly on the chest and back. the age of onset is usually in the fourth or fifth decade.

A seborrheic keratosis is a non-cancerous (benign) skin tumour that originates from cells, namely keratinocytes, in the outer layer of the skin called the epidermis. Like liver spots, seborrheic keratoses are seen more often as people age. The tumours (also called lesions) appear in various colours, from light tan to black...