1、The baby boy was born with a hydrocephalic condition, which caused his head to appear much larger than normal.
这个男婴出生时患有水头病，导致他的头部看起来比正常人大得多。

2、The hydrocephalic patient underwent surgery to relieve the pressure on his brain.
这位水头病患者接受了手术，以减轻对他的脑部施加的压力。