Types of Seborrheic Keratosis

Dr. Shane Chapman, MD discusses Types of Seborrheic Keratosis. See more at http://www.dermnet.com PLEASE RATE AND COMMENT!!!
Dermatosis papulosa nigra is a term used to describe the seborrheic keratoses of the face seen more commonly in African-Americans. Dermatosis papulosa nigra lesions are 1 to 2 mm, dark brown keratotic papules concentrated around the eyes

and upper cheeks, with an incidence of 30-35% in African-Americans.




Stucco keratoses, sometimes referred to as barnacles, are common, nearly inconspicuous, papular, warty lesions occurring on the lower legs, especially around the

Achilles tendon area, the dorsum of the foot, and the forearms of the elderly. The 1- to 10-mm, round, very dry, stuck-on lesions are considered by most patients to be simply manifestations of dry skin. The dry surface scale is easily

picked intact from the skin without bleeding, but it recurs shortly thereafter. The lesions can be removed with curettage or cryosurgery but are most often left untreated.




The sign of Leser-Treat is the sudden explosive onset of

numerous seborrheic keratoses in association with internal malignancy. Most patients have metastatic disease when the keratoses appear. The SKs often parallel the course of the malignancy, decreasing in number and size following

surgical or chemotherapeutic intervention and returning with recurrence of the cancer, but this is not always the case. Patients with numerous SKs need not be evaluated for malignancy unless the lesions erupt abruptly.

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[crazyazcordova]

What type of ca is usually associated with the abrupt appearance of the lesions? We have a resident who has some GI issues and not sudden break out of what they have diagnosed as "dermatitis" and now a fungal infection one of the tineas,