FAM111B基因突变致遗传性纤维性皮肤异色病伴跟腱挛缩、肌病和肺纤维化一例

【摘要】 患儿女，2岁2个月，生后7 d起反复发生湿疹样皮疹，后出现皮肤异色、毛发脱落。生后1个月10 d出现胆汁淤积，持续4个月后胆汁淤积改善，转氨酶增高。平素出汗少，不耐热，粗大运动发育稍落后。皮肤科检查：全身斑驳的色素沉着及色素脱失，暴露部位为著，头发、眉毛稀疏。父母无类似表现。全外显子测序显示，患儿FAM111B基因突变c.1883G>A（p.Ser628Asn），父母该基因未见突变。根据典型皮损、肝功能异常及基因检查结果，该患儿诊断为遗传性纤维性皮肤异色病伴跟腱挛缩、肌病和肺纤维化，FAM111B基因突变c.1883G>A可能是导致该患者临床表现的原因。予保肝、防晒、康复训练等治疗，随访10个月，患儿仍有皮损、转氨酶增高，无其他不适。

A case of hereditary fibrosing poikiloderma with tendon contracture,myopathy, and pulmonary fibrosis caused by a mutation in the FAM111B gene

【Abstract】 A 2-year- and 2-month-old girl developed recurrent eczema-like rashes 7 days after birth, followed by the occurrence of poikiloderma and hair loss. Cholestasis occurred at the age of 1 month and 10 days, which was improved but serum transaminase levels were elevated after 4 months. The patient usually presented with slight sweating, heat intolerance, and delayed gross motor development. Skin examination showed generalized mottled hypo- and hyper-pigmented patches, especially in the exposed areas, and sparse hair and eyebrows. Her parents had no similar clinical manifestations. Whole-exome sequencing showed a mutation c.1883G>A （p.Ser628Asn） in the FAM111B gene in the child, which was not found in her parents. According to the typical skin lesions, abnormal liver function and genetic testing results, this patient was diagnosed with hereditary fibrosing poikiloderma with tendon contracture, myopathy, and pulmonary fibrosis, and the mutation c.1883G>A in the FAM111B gene may be the cause of the patient′s clinical manifestations. The patient received hepatoprotective therapy, sun screen intervention, rehabilitation training, etc. After 10-month follow-up, the patient still presented with skin lesions and elevated transaminases, but without other discomforts.