Seborrheic keratosis is the most common benign tumour of epithelial origin, whose incidence increases with the advance of age. The aetiology of SK is not completely known but exposure to UV radiation may be an associated factor. Most of the cases have a rough, verrucous appearance, slightly elevated, and black or brown in colour. They are usually painless but at times present with pus discharge or ulceration.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10113801 | PMC |
http://dx.doi.org/10.7759/cureus.36381 | DOI Listing |
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