renal biopsy

例句：

1. 1. The patient underwent a renal biopsy to determine the cause of his kidney failure.
   患者接受了肾活检以确定其肾脏衰竭的原因。
2. 2. Renal biopsy is a procedure that involves taking tissue samples from the kidneys for testing.
   肾活检是一种涉及从肾脏取组织样本进行测试的程序。
3. 3. In some cases, renal biopsy may be necessary to diagnose or treat conditions such as cancer or inflammation.
   在某些情况下，肾活检可能是诊断或治疗癌症或炎症的必要条件。