[A case of the Stewart-Treves syndrome (post-mastectomy angiosarcoma) with special reference to a radiological study].

Reported is the case of a 54-year-old female manifesting the Stewart-Treves syndrome (a postmastectomy angiosarcoma.) The patient had developed an angiosarcoma in her lymphoedematous right shoulder and lower neck develop ten years after a radical mastectomy for a papillo-tubular adenocarcinoma of the right mammary gland. Radiologically, a well-enhanced tumor was revealed by computed tomography, which angiographically had more stains and tumor vessels than usual for a mammary carcinoma and less than usually seen in a cavernous hemangioma. Histologically, this tumor showed less of a luminal differentiation than a conventional angiosarcoma and resembled a fibrosarcoma. Computed tomography and angiography were found useful in achieving a diagnosis and the subsequent therapy for this Stewart-Treves syndrome.