In renal biopsy, a small sample of kidney tissue is removed with a needle. The test is sometimes used to evaluate a transplanted kidney. It is also used to evaluate an unexplained decrease in kidney function, persistent blood in the urine, or protein in the urine.
Review Date: 7/13/2021
Reviewed By: John D. Jacobson, MD, Department of Obstetrics and Gynecology, Loma Linda University School of Medicine, Loma Linda, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.