Answer:
Benign cutaneous tumors consisting of smooth muscle proliferation are called leiomyomas. Multiple cutaneous leiomyomas occur in widely varying numbers, sometimes diffusely scattered on the trunk, face, or extremities. They tend to increase gradually in number and are usually firm, pale, reddish-brown, intradermal nodules less than 1 cm in size. Frequently they harden and become painful on pressure or application of cold. These multiple lesions are believed to arise from arrectores pilorum muscles. Solitary angioleiomyomas are usually small, encapsulated, subcutaneous nodules less than 2 cm in size, and they are seen mainly on the legs. They may be sensitive to pressure and cold and are believed to arise from venular smooth muscle. A third variety is the solitary genital lesion located in the subcutis on either the scrotum, labia majora, or nipple area. They may reach sizes of up to several centimeters. Solitary tender leiomyomas must be differentiated at times from glomus tumor and eccrine spiradenoma. Excision is the only suitable treatment for symptomatic leiomyomas. There is a fairly high tendency for recurrence.