This rare tumor of the skin has been carefully studied by Heidingsfeld.6 The growths may take their origin from the muscle normally present in the walls of the vessels, in the arrector pili muscles, or in the muscular attachments to the glands. Clinically, they are subcutaneous single or multiple tumors that are apt to be painful upon pressure. In some instances they are associated with cavernous dilatation of the blood vessels. They can be diagnosed with certainty only by microscopical examination. Surgical intervention is curative.