What is a keratoacanthoma (KA)?

Updated: Jan 30, 2020
  • Author: Ginard I Henry, MD; Chief Editor: Gregory Gary Caputy, MD, PhD, FICS  more...
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Answer

Answer

Keratoacanthoma (KA) is a rapidly growing skin tumor that is considered by many to be a variant of squamous cell carcinoma. The rapid rate of growth of keratoacanthomas may help the clinician to distinguish it from many other cutaneous malignancies. Keratoacanthoma is typically a dome-shaped papule or nodule with a central crater of keratin. It tends to occur in males more often than in females, with a male-to-female ratio of 3-4:1. See the images below.

Keratoacanthoma Keratoacanthoma
Keratoacanthoma Keratoacanthoma
Keratoacanthoma Keratoacanthoma

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