malignant mesenchymoma的用法和样例：
例句
- The malignant mesenchymoma is not rare actully,but owing to the one sidedness of sampling,it is always diagnosed pathomorphogically as one singletissue sarcoma.
恶性间叶瘤并不少见，但由于病例取材局限，每把此肿瘤诊断成一种组织的肉瘤。 - Mesenchymal tumors of the urinary bladder are rare, and the majority of them are malignant.
摘要膀胱间叶瘤是罕见的，而且大多是恶性的。
