retroperitoneal fibrosis

例句：

1. 1. He developed retroperitoneal fibrosis after a long illness.
   他在长期患病后发展成了腹膜后纤维化。
2. 2. The patient's condition worsened due to the development of retroperitoneal fibrosis.
   由于腹膜后纤维化的形成，患者的病情恶化了。
3. 3.The diagnosis of retroperitonealfibrosis requires further investigation and treatment.
   腹膜后纤维化的诊断需要进一步的调查和治疗。