<prompt> The tumor, which may occur in the residual breast or overlying skin following wide local excision and radiotherapy isLeiomyosarcomaSquamous cell carcinomaBasal cell carcinomaAngiosarcoma  <response>: Secondary angiosarcoma presents in older women following radiotherapy for breast cancer a median of 10 years Stewa-Treves syndrome is a rare, deadly cutaneous angiosarcoma that develops in long-standing chronic lymphedema . Chronic lymphedema resulting from radical mastectomy andor radiotherapy for breast canceroccurs in arm, not breast tissue 