A Renal Biopsy is performed by passing a small needle through the abdominal wall, and a small amount of kidney tissue is removed and examined with a microscope to identify the presence of abnormal cells. An ultrasound will usually be used to ensure the needle finds the correct spot. Rarely, a kidney biopsy is done through an open incision in the operating room under general anesthesia, which allows your doctor to inspect the tissue and take a larger tissue sample for more extensive testing. A kidney biopsy is done to help your doctor diagnose the cause of kidney disease, diagnose or stage cancer, or to evaluate kidney function following transplant.
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