Seborrheic keratosis

A benign skin tumour (or lesion), slightly elevated, with a squamous surface that varies in colour, from yellowish to dark brown. Generally derived from solar lentigo (sun-induced or senile spot). Usually, seborrheic keratoses are numerous and affect the back, hips, abdomen, neck, face and back of the hands. They are prone to inflammation or traumatism and can crumble spontaneously.