What is seborrheic keratosis (SK)?

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

Answer

Seborrheic keratosis (SK), also known as seborrheic wart, senile keratosis, and basal cell papilloma, [12, 13] is a benign, noninvasive, hyperplastic epidermal lesion with a somewhat misleading title. No known relationship exists between seborrheic keratosis and sebaceous gland function. The term seborrheic relates to their greasy appearance and prevalence in regions of the body with a high concentration of sebaceous glands (ie, face, shoulder, chest, back). These are the most common benign skin tumors of the middle-aged and elderly populations. [14]

A seborrheic keratosis is shown in the images below.

Macular benign skin lesions: Seborrheic keratoses Macular benign skin lesions: Seborrheic keratoses of back and trunk.
Macular benign skin lesions: Seborrheic keratoses Macular benign skin lesions: Seborrheic keratoses of the face.

Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!