chronic intussusception

例句：

1. 1. The childwas diagnosed with chronic intussusception and required surgery.
   这个孩子被诊断出患有慢性肠套叠，需要手术。
2. 2. The patient's condition worsened significantly after the surgery.
   手术后，患者的病情明显恶化。
3. 3. Chronic intussusception can lead to serious complications if left untreated.
   如果不治疗，慢性肠套叠可能导致严重的并发症。