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误诊为鱼鳞病的Omenn综合征两姐妹及其家系遗传分析和胎儿诊断 被引量:1

Two sisters misdiagnosed as ichthyosis from a family with Omenn syndrome and their genetic study and prenatal diagnosis for a fetus
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摘要 目的:分析Omenn综合征的遗传学特征和胎儿产前诊断。方法:选取2019年8月解放军总医院第七医学中心附属八一儿童医院收治的Omenn综合征一家系,分析先证者体格检查、临床表现、家族史、用药史、治疗与随访情况及免疫、生化等辅助检查结果。全外显子捕获结合高通量测序技术分析先证者及其父母的基因型,母亲再孕时抽取羊水进行胎儿基因诊断。结果:先证者为女婴,1个月16 d时因"全身皮疹18 d,发热7 d"入院,院外疑诊鱼鳞病,1周后死亡。曾有一个姐姐死于类似疾病。先证者有红皮病、湿疹样皮疹及反复感染病史,血液T淋巴细胞、自然杀伤细胞增多,B淋巴细胞正常(T+B-NK+),免疫球蛋白E和嗜酸性细胞升高;先证者携带重组激活基因1(RAG1)的3个杂合突变,c.322C>T(p.R108*)为已知致病变异,来源于父亲;c.2807C>A(p.T936N)和c.2846T>C(p.I949T)来源于母亲同源染色体,均为新发变异,先证者确诊为Omenn综合征。母亲再次妊娠时,羊水细胞基因分析显示胎儿携带与母亲相同的RAG1 c.2807C>A和c.2846T>C,为杂合变异携带者,出生后发育正常。结论:Omenn综合征患者为重症联合免疫缺陷病中的一种罕见类型,于新生儿起病,易被误诊为鱼鳞病,遗传学分析有利于早期诊断和产前诊断。
作者 王艳 刘欣 谷亚楠 封志纯 Wang Yan;Liu Xin;Gu Ya′nan;Feng Zhichun(Bayi Children′s Hospital,Seventh Medical Center of PLA General Hospital,National Engineering Laboratory for Birth Defects Prevention and Control of Key Technology(Seventh Medical Center of PLA General Hospital),Beijing 100700,China)
出处 《中华实用儿科临床杂志》 CSCD 北大核心 2020年第9期709-711,共3页 Chinese Journal of Applied Clinical Pediatrics
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