(ker’a-to-ak’an-tho’mah)-a rapidly growing benign tumor of the skin. It resolves on its own in 6 or more months. However, due to the difficulty differentiating this visually & microscopically from skin cancer it is recommended that all keratoacanthomas should be surgically removed. Some classify this as a squamous cell carcinoma in situ. There are reports of treating this effectively with 2 or 3 weekly injections of chemotherapy, specifically methotextrate. Non-surgical approaches are better for the elder and infirm who cannot tolerate surgery than younger patients because the only way to know exactly what the condition is is to send sufficient tissue to the pathologist for examination.