The purpose of this study was to evaluate the efficiency of Japan Langerhans Cell Histiocytosis Study Group (JLSG) Protocol in treatment of children suffering from multiple system langerhans cell histiocytosis (MS-LCH). The clinical features, therapeutic response and prognosis of 11 children who were diagnosed and treated by JLSG in our department during October 2004 through October 2011 were analyzed. Among all 11 cases, 8 males and 3 females, the age at diagnosis was from 3 month to 6.5 years old with a median age of 3 years old. There were 10 cases of LCH with multi-system involvement (MS-LCH) and 1 case of single-system involvement (SS-LCH). Among those MS-LCH patients, 5 patients had risk organ involvement, and the other 5 patients did not develop risk organ involvement. All patients had been treated with JLSG protocol. The results showed that 4 cases achieved good response after 6-week induction treatment and the time of drug discontinuation were 5-20 months without relapse; 3 cases achieved partial response after 6-week induction treatment, among them 1 case did not relapse after discontinuation of drugs for 19 months, 1 case was still receiving maintenance treatment, 1 case abandoned induction treatment; 4 patients got no response(NR) or progressive disease after 6-week of induction treatment and were switched to salvage therapy, among them, 2 patients had stopped treatment for 2-20 months without relapse, 1 patient was still receiving maintenance treatment, one had changed to another therapy. It is concluded that the most of childhood LCH can be effectively controlled by immunochemical therapy based on the JLSG protocol. For children with LCH who has a poor response after 6-week induction treatment, LCH can still be well controlled if switched to salvage treatment.%本研究观察以JLSG(Japan Langerhans Cell Histiocytosis Study Group,JLSG)方案为基础治疗儿童多系统朗格汉斯细胞组织细胞增生症(MS-LCH)的疗效.采用回顾性分析法分析2004年10月至2011年10月在本科确诊为LCH的11例患儿的临床特点,总结JLSG方案治疗的效果及转归.在11例LCH患儿中男8例,女3例,中位年龄3岁(3个月-6.5岁)；单系统LCH(SS-LCH)1例,MS-LCH 10例.在MS-LCH中,累及高危器官5例.采用JLSG方案进行治疗.结果显示,诱导6周反应好者4例,停药后随访5-20个月无复发；诱导6周部分反应者3例,1例停药后随访19个月无复发,1例维持治疗中,1例放弃治疗；诱导6周无反应或疾病进展,采用挽救方案治疗4例,2例停药后随访2-20个月无复发,1例维持治疗中,1例改用其他化疗方案.结论:采用JLSG方案治疗MS-LCH能够获得较好的疗效,对于初始诱导6周无反应和疾病进展的LCH患儿,及时更换挽救方案亦可获得较好疗效.
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