Keratoacanthoma on the Upper Lid

Keratoacanthoma on the upper lid. Keratoacanthoma is a squamous cell tumour that is in principle benign but the histological distinction from a well-differentiated squamous cell carcinoma is often impossible. Keratoacanthoma typically grows in a few weeks, has a hyperkeratinized plug and is surrounded by a collar-like rim of skin. The patient should be referred for treatment (surgical excision or cryotherapy) without delay because the tumour may grow very rapidly which makes the treatment more problematic.

Picture: Raimo Suhonen