Carolinas HealthCare System

A renal biopsy is the removal of a small piece of tissue from the kidney in order to examine it for an unexplained drop in kidney function, persistent blood in the urine or protein in the urine. The test can also be used to evaluate a transplanted kidney.

The most common kidney biopsy uses ultrasound to guide the physician to the proper area in the kidney. The biopsy is done in the hospital. Before the procedure, your child’s physician will review what to expect and discuss the benefits and risks with you. Sometimes the physician will use a CT-guided kidney biopsy and, in some cases, he or she will recommend a surgical biopsy.

Whichever method is used, your child will receive a numbing medication so that there will be minimal pain. Your child may feel sore for the first few days following the biopsy. He or she may also see bright red blood in the urine the first 24 hours after the test. This is normal and nothing to be alarmed about. However, if the bleeding persists, speak with your child’s physician.