A kidney Reference biopsy Opens New Window is done by inserting a long needle through the back (flank) or belly to remove a sample of kidney tissue.
Biopsy results are ready in 2 to 4 days. If tests are done to find infections, it may take several weeks for the results to be ready.
The structure and cells of the kidney look normal. There are no signs of inflammation, scar tissue, infection, transplant rejection, or cancer.
The sample may show signs of scarring due to infection, poor blood flow, Reference glomerulonephritis Opens New Window, a kidney infection (pyelonephritis), or signs of other diseases that affect the body, such as Reference systemic lupus erythematosus Opens New Window.
Kidney tissue may show tumors that were not expected, such as Wilms' tumor (which occurs in early childhood) and renal cell cancer (which is most common after age 40).
Kidney tissue shows signs of transplant reactions, rejection, or failure.
|By:||Reference Healthwise Staff||Last Revised: Reference September 25, 2012|
|Medical Review:||Reference E. Gregory Thompson, MD - Internal Medicine
Reference Christopher G. Wood, MD, FACS - Urology, Oncology