中文摘要：

4例Prader-Willi综合征（PWS）患儿均为女性,确诊年龄6-12岁,均有肥胖,特殊面容,发育迟缓、智力障碍等临床表现,遗传学检测提示其中2例为15q11.2-q13区域父源性缺失,1例为15q11.2-q13区域母源性同源二倍体,1例15q11.2-q13区域未发现异常。4例患者存在不同程度的内分泌代谢紊乱：2例身材矮小,其中1例第二性征延迟,另1例合并2型糖尿病;1例表现为胰岛素抵抗,无乳腺发育;1例患儿的身高处于P3-P（10）,性早熟。PWS患者存在多种内分泌功能紊乱,长期内分泌专科随访及管理十分重要。

英文摘要：

This article reports the clinical features and endocrine and metabolic features of 4 children with Prader-Willi syndrome（PWS）. All the patients were female and aged 6-12 years at diagnosis. All of them had clinical manifestations of obesity, unusual facies, developmental retardation, and intellectual disability. Genetic detection showed that 2 patients had paternal deletion of the 15q11.2-q13 region, one patient had maternal autodiploid in the 15q11.2-q13 region, and one patient had no abnormality in the 15q11.2-q13 region. All patients had varying degrees of endocrine and metabolic disorders： 2 patients had short stature, among whom one had delayed appearance of secondary sex characteristics and the other one had type 2 diabetes; one patient had insulin resistance and no mammary gland development; one patient had a body height of P3-P10 and precocious puberty. Patients with PWS have various endocrine disorders, so long-term endocrine follow-up and management is very important.