The exact cause of seborrheic keratoses isn't known. They are very common and generally increase in number with age. They tend to run in some families, so inheritance may play a role.
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- Goldsmith LA, et al., eds. Fitzpatrick's Dermatology in General Medicine. 8th ed. New York, N.Y.: The McGraw-Hill Companies; 2012. http://www.accessmedicine.com/resourceTOC.aspx?resourceID=740. Accessed July 3, 2013.
- Habif TP. Clinical Dermatology: A Color Guide to Diagnosis and Therapy. 5th ed. Edinburgh, U.K.; New York, N.Y.: Mosby Elsevier; 2010. http://www.mdconsult.com/books/about.do?about=true&eid=4-u1.0-B978-0-7234-3541-9..X0001-6--TOP&isbn=978-0-7234-3541-9&uniqId=230100505-57. Accessed July 3, 2013.
- Seborrheic keratosis. American Academy of Dermatology. http://www.aad.org/dermatology-a-to-z/diseases-and-treatments/q---t/sebhorrheic-keratoses. Accessed July 3, 2013.
- AskMayoExpert. Seborrheic keratosis. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2013.
- Goldstein BG, et al. Overview of benign lesions of the skin. http://www.uptodate.com/home. Accessed July 3, 2013.