Stewart Treves Syndrome in a Woman with Mastectomy.

Stewart Treves Syndrome is an angiosarcoma generally seen long time after radical mastectomy in breast carcinoma patients in chronic lymphoedema area. It's an angiosarcoma developed on a long standing lymphoedema, following a radical mastectomy. An 86-year-old woman was referred to our Dermatology outpatient clinic which developed a giant erythematous, oedematous, purplish lobulated plaque on her right forearm anteromedially with a few satellite erythematous papulonodules on her arm. The pathology revealed spindle-shaped tumour cells invading dermis with vascular differentiation into the subcutaneus tissue which are compatible with a diagnosis of angiosarcoma.