What Is a Kidney Biopsy?

A kidney biopsy, also known as a renal biopsy, is a medical procedure in which a small sample of kidney tissue is removed for examination under a microscope. This procedure helps diagnose kidney diseases, evaluate the severity of kidney damage, and guide treatment decisions. The biopsy can reveal information about the structure and function of the kidney tissue, including signs of inflammation, scarring, or other abnormalities.