摘要目的:探讨1例由 STAMBP基因突变所致小头畸形-毛细血管畸形综合征患者的临床及遗传学特点。 方法:收集安徽省儿童医院2023年8月收治的1例 STAMBP基因突变所致小头畸形-毛细血管畸形综合征患儿的临床资料，应用全外显子组测序对患儿及其父母进行基因检测，并用生物学软件预测其危害性。同时查阅并复习文献，分析并总结本例及文献中患儿的临床和遗传学特点。 结果:患儿男性，2岁7个月，有特殊面容、小头畸形、难治性癫痫、重度全面性发育落后、毛细血管畸形。基因检测结果显示该患儿 STAMBP基因存在复合杂合突变NM_001353967：c.367delG［p.E123fs *27（p.Glu123fsTer27）和c.159A>C（p.Glu53Asp）］，分别遗传于其母亲和父亲。该变异在人类基因变异数据库、dbSNP，gnomAD数据库等中均未被收录。对蛋白质结构进行建模和预测，结果提示 STAMBP基因的c.367del（p.Glu123Lysfs *27）和c.159A>C（p.Glu53Asp）对STAMBP蛋白的功能具有负面影响。 结论:STAMBP基因复合杂合突变c.367delG（p.Glu123fsTer27）和c.159A>C（p.Glu53Asp）可能是该患儿的致病因素，进一步拓展了 STAMBP基因的变异谱及小头畸形-毛细血管畸形综合征的基因型，为家庭遗传咨询提供了指导。

abstractsObjective:To investigate the clinical and genetic characteristics of a child with microcephaly-capillary malformation syndrome due to a STAMBP mutation. Methods:The clinical data of a case of microcephaly-capillary malformation syndrome caused by STAMBP gene mutation admitted to Anhui Children′s Hospital in August 2023 were collected. The genes of the child and his parents were detected by whole exome sequencing, and the risk was predicted by biological software. At the same time, the clinical characteristics of the child were analyzed and the literature was reviewed. Results:The patient is a male child aged 2 years and 7 months. The patient had special features, microcephaly, refractory epilepsy, severe comprehensive developmental delay, and capillary malformations. The results of genetic testing showed that the STAMBP gene in the child had complex heterozygous mutations NM_001353967: c.367delG[p.E123fs *27(p.Glu123fsTer27) and c.159A>C(p.Glu53Asp)], inherited from his mother and father respectively. The mutations have not been recorded in the HGMD, dbSNP and gnomAD databases,etc. The protein structure of the STAMBP gene was modeled that predicted c.367del(p.Glu123Lysfs *27) and c.159A>C (p.Glu53Asp) had a negative effect on the function of STAMBP protein. Conclusion:The STAMBP gene complex heterozygous mutations c.367delG(p.Glu123fsTer27) and c.159A>C(p.Glu53Asp) may be the pathogenic factor of this child, which further expands the variation spectrum of the STAMBP gene and the genotype of microcephaly-capillary malformation syndrome, and provides guidance for family genetic counseling.