: CT-Guided Kidney Biopsy (Renal Mass or Tissue Sampling)

: What This Test Is

: A CT-guided kidney biopsy is a procedure in which a doctor uses a CT scanner to see the kidney clearly while inserting a needle to remove a small piece of kidney tissue. The sample is then sent to a pathology laboratory for microscopic and other analyses.

: Why It Is Done

: It may be performed to evaluate a suspicious mass or cyst in the kidney, to investigate unexplained kidney dysfunction, or to assess whether a kidney condition is benign or malignant. Your doctor will explain the specific reason in your case.

: How to Prepare

: Your care team will give you instructions before the procedure. These often include fasting for a period beforehand, reviewing medications that affect bleeding (such as blood thinners), and arranging for someone to drive you home. Tell your team about allergies, pregnancy, and any bleeding disorders.

: What to Expect

: You may receive local numbing medicine and possibly sedation. The doctor uses CT images to position the needle, collects the sample, and applies pressure to the site. The procedure is usually brief, but you will be monitored afterward for bleeding or other complications before going home.