Medical Encyclopedia:
Kidney Biopsy: Purpose
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The test is usually done to diagnose kidney disease and to evaluate the extent of damage to the kidney. A biopsy is also frequently ordered to detect the reason for acute renal failure when normal office procedures and tests fail to establish the cause. In addition, information regarding the progression of the disease and how it is responding to medical treatment can be obtained from a biopsy. Occasionally a biopsy may be done to confirm a diagnosis of kidney cancer, to determine its aggressiveness, and decide on the mode of treatment.
— Lata Cherath, PhD
