Kidney Function Assessment with Computed Tomography-Guided Renal Biopsy Analysis

What This Test Measures

The test includes a computed tomography (CT) scan to visualize kidney structure and identify abnormalities such as masses, cysts, or scarring. A small sample of kidney tissue is then obtained via a guided biopsy to analyze cellular and molecular details, which may reveal underlying causes of kidney issues like inflammation, fibrosis, or genetic disorders.

Why It’s Ordered

Your healthcare provider may recommend this test if you have symptoms like persistent pain, unexplained blood in urine, or signs of kidney disease (e.g., high blood pressure, protein in urine). It’s also used to confirm diagnoses in conditions like glomerulonephritis, polycystic kidney disease, or kidney tumors.

Sample Collection and Process

A CT scan is performed first, often with contrast dye to highlight kidney structures. Afterward, a biopsy needle is guided to a specific kidney area under imaging to collect a tissue sample. The sample is then analyzed in a lab to detect abnormalities in cells, proteins, or genetic markers.

Preparation and Risks

No special preparation is needed for the CT scan, but you may be asked to fast for the biopsy. Common risks include minor bleeding, infection, or allergic reactions to contrast dye. Rarely, complications like kidney damage or allergic reactions to anesthesia may occur.