<prompt> The tumour, which may occur in the residual breast; or overlying skin following wide local excision and radiotherapy for mammary carcinoma is:LeiomyosarcomaSquamous cell carcinomaBasal cell carcinomaAngiosarcoma  <response>: Ans. d AngiosarcomaRef: Sabiston 19e p845 Post mastectomy and adjuvant RT results in Lymphedema of Arms. This lymphedema of upper limb may get converted to lymphangiosarcoma-known as Stewart Treves Syndrome Treatment - Forequarter amputation. Has very bad prognosis. 