弄清恶性横纹肌样瘤（ＭＲＴ）的组织细胞起源是进行诊断并攻克防治问题的基础。自１９７８年首例发现于肾脏以来，有关该肿瘤的报道逐年增多，但迄今发现的ＭＲＴ均难以复制成功，ＭＲＴ的起源仍是医学上悬而未决的重大难题。作者在纯化３代的肿瘤阴性的对照猫肾和犬肾原... Understanding the histiocytic origin of malignant rhabdoid tumors (MRT) is the basis for diagnosis and to overcome control problems. Since the first case was found in the kidney in 1978, the reports on this tumor have been increasing year by year. However, the MRT found so far has been difficult to replicate successfully. The origin of MRT is still a major pending problem in medicine. The authors purified three generations of tumor-negative control cat kidneys and canine kidneys...