Sinusoidal hemangioma of the arm: case report and review of literature.

Sinusoidal hemangioma is a rare variant of cavernous hemangioma that develops more frequently subcutaneous, often in the extremities. We report the case of a 19-year-old patient three times operated for a recurrent soft tissue tumor, located in the distal third of the antero-medial face of the right arm. Treatment was surgical and consisted of microsurgical excision of a tumor with dermal and intramuscular location. Histopathological analysis showed a nodular proliferation of interconnected thin-walled blood vessels, sinusoidal growth pattern and the presence of pseudopapillary structures. Immunohistochemical investigations were positive for CD31, CD34 and Ki67 index decreased, confirming the benign nature of vascular proliferation.