摘要目的:探讨Kagami-Ogata综合征的临床表现、遗传学特征及治疗方案。方法:分析北京协和医院收治的1例经羊水穿刺基因诊断Kagami-Ogata综合征患儿的临床特征、基因变异类型和治疗情况，并以“Kagami-Ogata综合征”、“14q32微缺失综合征”、“衣架征”、“14号染色体父源二倍体”、“Kagami-Ogata syndrome”、“14q32 gene”、“Coat Hanger”和“UPD（14）pat”为关键词，分别对中华医学期刊全文数据库、中国知网、万方数据库、PubMed、Web of Science、Embase、Cochrane Library自建库至2023年1月23日收录的文献进行检索，总结国内外报道的Kagami-Ogata综合征患儿的临床特征、治疗情况和基因类型。结果:本例患儿男，胎龄30周，出生体重2 035 g，孕期超声提示胎儿偏大，双肾盂分离，下腹部多处肠管增宽，双手握拳及重叠指，羊水多。生后即出现呼吸困难并逐渐加重，有特殊面容（下颌小、颈短、鼻梁塌、鼻孔向上、双耳外耳廓短小、耳轮塌陷、双侧外耳道狭窄）、钟形胸廓、腹直肌分离、姿势异常（手指重叠、握拳），同时患儿喂养困难、反复发热，且持续依赖呼吸机支持。全外显子组测序提示患儿及其母亲14q32.2区段存在268.2Kb缺失（101034306_101302541），父亲正常。因患儿预后不佳，家长放弃治疗，临终关怀2 d后患儿1月龄时死亡。文献检索共收录36篇文献，包括78例临床信息完整的Kagami-Ogata综合征患儿，加上本例共79例，临床表现主要包括特殊面容及胸廓发育异常（79/79，100%）、羊水过多（71/75，94.7%）、喂养困难（55/63，87.3%）、腹壁缺陷（57/72，79.2%）、关节挛缩（39/70，55.7%）、呼吸支持依赖（29/56，51.8%），长期随访患儿中86.8%（59/68）存在体格、运动及智力发育迟滞，39.7%（25/63）在5岁内死亡或放弃。基因检测父源二倍体变异44例（55.7%），母源缺失23例（29.1%），表突变8例（10.1%），未报道变异4例（5.1%）。结论:Kagami-Ogata综合征是一组累及多器官系统的遗传印记基因疾病，产前检查可发现羊水过多等异常，典型体征、特殊影像学表现及14q32基因分析有助于疾病的诊断。

abstractsObjective:To study the clinical manifestations, genetic profiles and treatment of Kagami-Ogata syndrome (KOS).Methods:A neonate admitted to our hospital was genetically diagnosed of KOS from amniocentesis sampling. The phenotype, genotype and treatment of the neonate were analyzed. Multiple databases were searched using key words including "Kagami-Ogata syndrome", "14q32 microdeletion syndrome", "coat-hanger ribs", "paternal uniparental disomy (pUPD)(14) " from the inception of the databases to Jan. 23th 2023. The clinical features, genotype and treatment of patients from the literature were summarized.Results:The neonate in our hospital was born at 30 weeks gestational age with a birth weight of 2 035 g. Prenatal ultrasound indicated overgrowth, bilateral fetal renal pelvis dilatation (FRPD), dilatation of intestines in lower abdomen, clenched hands with overlapping fingers and polyhydramnios. After birth, the neonate showed progressively worsening respiratory distress, distinct facial features (small jaw, short neck, flat nasal bridge, upward-facing nostrils, small and malformed ears with auricular deformity and narrow external auditory canals), bell-shaped thorax, diastasis recti and abnormal posture (overlapping fingers, clenched fists), as well as feeding difficulties, recurrent fever and dependence of respiratory support. Whole exome sequencing (WES) revealed a 268.2Kb deletion (101034306_101302541) in 14q32.2 region on both the neonate and the mother and the father was otherwise normal. The prognosis was poor and the parents refused further treatment. The neonate died at one month of age after two days of palliative care. A total of 36 articles were identified in the literature review, including 78 KOS cases with complete clinical data (a total of 79 cases adding our case).The primary clinical manifestations included distinctive facial and thoracic abnormalities (79/79, 100%), polyhydramnios (71/75, 94.7%), feeding difficulties (55/63, 87.3%), abdominal wall defects (57/72, 79.2%), joint contractures (39/70, 55.7%) and dependence of respiratory support (29/56, 51.8%). Long-term follow-up revealed 86.8% (59/68) experienced physical, movement and intellectual development delay, 39.7% (25/63) died or gave up treatments within five years. Genetic testing showed pUPD in 44 cases (55.7%), maternal deletions in 23 cases (29.1%), epimutations in 8 cases (10.1%) and unreported variations in 4 cases (5.1%).Conclusions:KOS is a genetic imprinting disorder affecting multiple organs. Prenatal screening can detect abnormalities such as polyhydramnios. Specific clinical signs, radiological findings and 14q32 gene analysis are helpful for the diagnosis of the disease.