simple cyst of kidney

例句：

1. 1. The patient had a simple renal cyst that was causing him discomfort.
   患者有一个简单的肾囊肿，这让他感到不适。
2. 2.The diagnosis of the simple renal cyst led to further testing and treatment.
   诊断出肾囊肿后，进行了进一步的测试和治疗。
3. 3. Simple renal cysts are relatively common in children and can resolve on their own with time.
   肾囊肿在儿童中相对常见，随着时间推移可以自行解决。