<prompt> The most common site for lymphagiosarcoma isLiverSpleenPost mastectomy armRetroperitoneum  <response>: Ans. c Post mastectomy armRef: Cancer 1948; 1:64-81Lymphangiosarcoma is a misnomer because this malignancy seems to arise from blood vessels instead of lymphatic vessels.Most commonly, this tumor is a result of lymphedema induced by radical mastectomyStewart-Treves syndrome is a rare, cutaneous angiosarcoma that develops in long-standing chronic lymphedema. 