What is a seborrheic keratosis (SK)?

Updated: Jan 30, 2020
  • Author: Ginard I Henry, MD; Chief Editor: Gregory Gary Caputy, MD, PhD, FICS  more...
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The natural history of this lesion includes an evolution from a smooth featureless lesion into a verrucous, thickened plaque with crusting and ulceration. This is believed to be a congenital lesion. Microscopically, many sebaceous glands in a vascular stroma with abortive hair follicles are observed. Some of the sebaceous glands communicate with the surface directly. Complete surgical excision is the treatment of choice.

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