Crizotinib in the treatment ofALK gene mutation positive children with inflammatory myofibroblastic tumor: a report of 4 cases
廖雪莲 1蒋莎义 1杨静薇 1刘江斌 2吕志宝 2单卫华
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作者信息
1. 1上海市儿童医院，上海交通大学医学院附属儿童医院血液肿瘤科，上海 200062
2. 2上海市儿童医院，上海交通大学医学院附属儿童医院普外科，上海 200062
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摘要
目的 探讨克唑替尼靶向治疗儿童ALK基因突变阳性炎性肌纤维母细胞瘤(IMT)的有效性和安全性。 方法 回顾性分析2019年1月至2021年6月上海市儿童医院收治的4例ALK基因突变阳性IMT患儿资料，其中3例给予靶向药物克唑替尼[280 mg/(m2·次)治疗，每12 h 1次口服]，1例选择肿瘤完整切除术后观察，分析疗效及药物不良反应。 结果 4例均为男性，年龄2岁3个月~11岁3个月。肿瘤源于腹腔2例，右侧眼眶1例，右侧肺部1例。免疫组织化学和荧光原位杂交法均呈ALK基因突变阳性，综合治疗后均达完全缓解。其中3例患儿采用了口服克唑替尼，2例用药1年时试行停药，1个月后复发，再次用药仍达完全缓解。总随访8~30个月，均存活。未见血常规、肝肾功能、心肌酶谱、心功能、听力及视力等异常。心电图Q-T间期延长发生于2例患儿中，暂时停药可恢复，继续用药未出现心电图异常。 结论 克唑替尼可用于治疗ALK基因突变阳性IMT，使肿瘤缩小和巩固术后治疗，是目前手术切除困难和复发难治性儿童IMT的良好选择。 Objective To investigate the efficacy and safety of targeted therapy with Crizotinib for children with ALK gene mutation positive inflammatory myofibroblastic tumor (IMT). Methods A retrospective analysis was performed on 4 children with ALK gene mutation positive IMT admitted to Shanghai Children′s Hospital from January 2019 to June 2021.Among them, 3 cases were given the targeted drug Crizotinib[280 mg/(m2· time), q12h] orally, and 1 case was observed after complete tumor resection to analyze the efficacy and adverse drug reactions. Results All 4 cases were male, aged from 2 years and 3 months to 11 years and 3 months.The tumors originated from the abdominal cavity in 2 cases, the right orbit in 1 case, and the right lung in 1 case.Pathological immunohistochemistry and fluorescence in situ hybridization were both positive for ALK gene mutation, and complete remission was achieved after comprehensive treatment.Among them, 3 patients were treated with oral Crizotinib, and 2 patients were tried to stop taking the drug for 1 year, relapsed 1 month later, and still achieved complete remission after the second treatment.The 4 cases were followed up for 8-30 months, and all survived.All the cases showed no abnormalities in blood image, liver and kidney function, myocardial enzyme profile, cardiac function, hearing and vision, and 2 cases showed prolonged Q-T interval in the course of Crizotinib treatment, which could be recovered by temporary withdrawal of drug, and no abnormality in electrocardiogram was found in continued drug use. Conclusions Crizotinib was used to treat ALK mutation positive IMT, shrink tumor and consolidate postoperative treatment, which is a good choice for IMT in children with difficult surgical resection and refractory recurrence.
Abstract
Objective To investigate the efficacy and safety of targeted therapy with Crizotinib for children with ALK gene mutation positive inflammatory myofibroblastic tumor (IMT). Methods A retrospective analysis was performed on 4 children with ALK gene mutation positive IMT admitted to Shanghai Children′s Hospital from January 2019 to June 2021.Among them, 3 cases were given the targeted drug Crizotinib[280 mg/(m2· time), q12h] orally, and 1 case was observed after complete tumor resection to analyze the efficacy and adverse drug reactions. Results All 4 cases were male, aged from 2 years and 3 months to 11 years and 3 months.The tumors originated from the abdominal cavity in 2 cases, the right orbit in 1 case, and the right lung in 1 case.Pathological immunohistochemistry and fluorescence in situ hybridization were both positive for ALK gene mutation, and complete remission was achieved after comprehensive treatment.Among them, 3 patients were treated with oral Crizotinib, and 2 patients were tried to stop taking the drug for 1 year, relapsed 1 month later, and still achieved complete remission after the second treatment.The 4 cases were followed up for 8-30 months, and all survived.All the cases showed no abnormalities in blood image, liver and kidney function, myocardial enzyme profile, cardiac function, hearing and vision, and 2 cases showed prolonged Q-T interval in the course of Crizotinib treatment, which could be recovered by temporary withdrawal of drug, and no abnormality in electrocardiogram was found in continued drug use. Conclusions Crizotinib was used to treat ALK mutation positive IMT, shrink tumor and consolidate postoperative treatment, which is a good choice for IMT in children with difficult surgical resection and refractory recurrence.
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