[名词解释] 肉瘤(sarcoma)

癌肉瘤(carcinosarcoma) 女性，46岁，左下肢乏力，右下肢麻木1年。定性诊断应考虑() ["A．胶质瘤","B．脊膜瘤","C．转移瘤","D．蛛网膜囊肿","E．脊髓炎"] 外生性生长(exophytic growth) 肿瘤的演进(progression) 交界性肿瘤(borderline tumor) 肉瘤(sarcoma)