Seborrheic keratosis

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Seborrheic keratosis
Seborrheic keratosis.jpg
Seborrheic Keratosis: Gross natural color photo of face with multiple typical lesions. Image courtesy of Professor Peter Anderson DVM PhD and published with permission © PEIR, University of Alabama at Birmingham, Department of Pathology
ICD-10 L82
ICD-9 702.1
OMIM 182000
DiseasesDB 29386
eMedicine derm/397 
MeSH D017492

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


A seborrheic keratosis is a benign skin growth that is very common among people over 40 years of age.

Presentation

The growths resemble flattened or raised warts, but have no viral origins and may exhibit a variety of colors, from pink or yellow through brown and black. Because only the top layers of the epidermis are involved, seborrheic keratoses are often described as having a "pasted-on" appearance.

Treatment

Because the tumors are rarely painful, treatment is not often necessary. There is a small risk of localized infection caused by picking at the lesion. If a growth becomes excessively itchy, or if it is irritated by clothing or jewelry, cryosurgery has been found to be highly effective in their removal. The main danger associated with seborrheic keratoses lies in their resemblance to malignant melanomas, which has sometimes led to a misdiagnosis of the cancerous lesions. If there is any doubt, a skin biopsy will allow a physician to make a correct diagnosis.

Causes

A mutation of a gene coding for a growth factor receptor (FGFR3), has been associated with seborrheic keratosis.[1]

References

  1. Hafner C, Hartmann A, Vogt T (2007). "FGFR3 mutations in epidermal nevi and seborrheic keratoses: lessons from urothelium and skin". J. Invest. Dermatol. 127 (7): 1572–3. doi:10.1038/sj.jid.5700772. PMID 17568799.

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