pyencephalus

例句：

1. 1. The patient's condition worsened significantly after the surgery.
   手术后，患者的病情明显恶化。
2. 2. The child was diagnosed with pyencephalus due to a rare genetic disorder.
   这个孩子因为一种罕见的遗传病被诊断出患有脑积水。
3. 3. The doctor recommended that the patient undergo further tests for pyencephalus.
   医生建议患者进行进一步的测试以确定是否患有脑积水。