retroperitoneal paraganglioma

例句：

1. 1. Thepatient was diagnosed with a retroperitoneal paraganglioma and underwentsurgery to remove it.
   患者被诊断出患有腹膜后嗜铬细胞瘤，并接受了手术以移除它。
2. 2. The tumorwas located in the retroperitoneal area, making it difficult to accessfor treatment.
   肿瘤位于腹膜后区域，这使得治疗难以进行。
3. 3. The patient's condition worsenedafter the surgery, necessitating further investigation into the causeof the retroperitoneal paraganglioma.
   手术后，患者的病情恶化，需要进一步调查腹膜后嗜铬细胞瘤的原因。