Skin tumor that grows rapidly (especially in older people) and resembles a carcinoma but does not spread

• It usually disappears spontaneously, often leaving a scar

Wikipedia Word definitions in Wikipedia
Keratoacanthoma (KA) is a common low-grade (unlikely to metastasize or invade) skin tumour that is believed to originate from the neck of the hair follicle . The defining characteristic of KA is that it is dome-shaped, symmetrical, surrounded by a smooth ...

WordNet Word definitions in WordNet
n. skin tumor that grows rapidly (especially in older people) and resembles a carcinoma but does not spread; it usually disappears spontaneously, often leaving a scar

Wiktionary Word definitions in Wiktionary
n. (context pathology English) A common low-grade malignancy of the skin.