Keratoacanthomas (KAs) are very rapidly growing squamo-proliferative lesions that look like well-differentiated squamous cell carcinomas (SCCs) pathologically. Keratoacanthomas are characterised by rapid growth over a few weeks to months, followed by spontaneous resolution over 4-6 months in most cases.
This is a companion discussion topic for the original article at https://patient.info/doctor/dermatology/keratoacanthoma-pro