Multinucleate cell angiohistiocytoma: treatment with argon laser.

Multinucleate cell angiohistiocytoma mainly affects middle-aged women, and usually presents as grouped reddish-brown papules. Histopathological features include the presence of multinucleate cells in the reticular dermis, and numerous dilated dermal vessels. The lesions are benign, and may persist for years. Treatment is needed for cosmetic reasons. We report the successful use of the argon laser to treat two patients who had multinucleate cell angiohistiocytoma.