Magnetic resonance imaging studies of children with Prader-Willi syndrome reveal anomalies in the structure of their pituitary gland, a relatively small brain stem and atrophy in the cerebral cortex.

• 普-威二氏综合征患儿的核磁共振呈像显示他们的脑下垂体结构异常：相对小的脑干和大脑皮层萎缩。