Chemotherapy-induced Necrosis in Ewing Sarcoma

"The aim of the present study is to evaluate which is the best scoring tool to determine the histological response to chemotherapy in localized Ewing sarcoma of bone.~The study will exam all the different systems to evaluate the histological necrosis after neo-adjuvant chemotherapy in all patients with localized Ewing sarcomas of bone surgically treated between 1982 and 2012."