Abstract： To the Editor:A uterine carcinosarcoma (malignant mixed Mtüllerian tumor [MMMT]) is a rare,aggressive,malignant tumor which demonstrates both malignant epithelial (carcinoma) and mesenchymal (sarcoma) components.[1] MMMTs account for 2-5％ of all uterine malignancies.Metastatic progression is uncommon and occurs through hematologic,lymphatic,and intraperitoneal spread.Risk factors for MMMTs include radiation,excessive estrogen exposure,obesity,and nulliparity.The 2-year survival rate for patients with MMMTs is 53％ for Stage Ⅰ disease and decreases to 8.5％ for Stages Ⅱ and Ⅲ.