Dermatosis Papulosa Nigra

Dermatosis Papulosa Nigra is a common skin condition which typically affects the neck and/or face, but may appear in other areas such as upper torso. The condition consists of the formation of small papules which are black or brown in color and firm and smooth in texture. Lesions typically appear during adolescence, and proliferate as the affected person ages. Lesions are not accompanied by symptoms.

The exact cause of Dermatosis Papulosa Nigra is unknown. The lesions themselves are Seborrhoeic Keratoses, and are thought to be due to a defect in hair follicles. Approximately one half of all cases have a genetic link. The condition typically affects darker skinned people, and is most prevalent in blacks, though it is seen in darker skinned Asian and Polynesian populations. Women are more likely to develop the condition than men.

Differential Diagnosis (Other conditions with similar appearance)

Nevi, melanocytic
Seborrheic Keratosis

Dermatosis papulosa nigra is diagnosed based on the characteristic appearance of the affected area. A skin biopsy may be performed to confirm the diagnosis and to rule out similar appearing conditions.