Cavernous Hemangioma of the Left Forearm.

Cavernous hemangiomas are benign hamartomatous proliferation of endothelial tissues. They can arise virtually anywhere in the body and do not contain tissues native to the organ or structure in which they are located. Contrary to what is seen in capillary hemangiomas and the cavernous cutaneous variety, intramuscular hemangiomas almost always never regress. We report a case of intramuscular cavernous hemangioma in an 18-year-old male Nigerian with swelling in the left forearm of 9 years duration. The swelling progressively increased in size and nearly involved the entire forearm with occasional pain and no preceding history of trauma. Pre-operative plain radiographs showed an ill-defined soft tissue swelling with multiple calcifications or phleboliths. Surgical excision with ligation of feeding vessels was done and histology confirmed the diagnosis with free margin of excision. Post-operative clinical improvement was marked.