Angiosarcoma presenting as diffuse alveolar hemorrhage.

Angiosarcoma has been reported as occurring in both postirradiation and postradical mastectomy patients. Described is a patient, postmastectomy and irradiation, with alveolar hemorrhage secondary to angiosarcoma. Angiosarcoma, primary or metastatic to lung, should be included in the differential diagnosis of diffuse alveolar hemorrhage in this patient population.