Prader-Willi综合征是一种复杂遗传性疾病,临床特征是新生儿期肌张力减退、性腺功能减退,饮食过度导致肥胖,身材短小和精神运动性发育迟缓,身体各部分比例正常。此类患儿骨折危险度增加。由于骨矿区域含量(BMA)可反映骨骼强度和骨折危险度,因而作者对此类患儿采用双能X线吸收测量仪(DEXA)测定总体BMA,并了解患儿身高和增长 Prader-Willi syndrome is a complex genetic disease characterized by neonatal hypothyroidism, hypogonadism, over-diet-induced obesity, short stature and psychomotor retardation, with normal proportions of all parts of the body. Such children fracture risk increase. Because bone mineral content (BMA) reflects skeletal strength and fracture risk, the authors used this dual-energy X-ray absorptiometer (DEXA) to determine the overall BMA and to understand the patient’s height and growth