CT-Guided Retroperitoneal Biopsy with Intravenous Contrast

What is this test?

A CT-guided retroperitoneal biopsy is a minimally invasive procedure in which a needle is directed into tissue behind the abdominal lining, also called the retroperitoneum, under CT imaging guidance. Intravenous contrast may be used to help the radiologist identify the target and guide the needle safely.

Why might I need this test?

This test may be recommended when an imaging study shows an unexplained mass, enlarged lymph nodes, or another abnormal area in the retroperitoneum. Tissue analysis can help determine whether the finding is caused by cancer, infection, inflammation, or another condition.

How is the test performed?

You will usually lie on a CT table, and the radiologist will use CT images to locate the biopsy site. After cleaning and numbing the skin, a biopsy needle is inserted through the skin into the target, and tissue samples are removed for examination. A small dressing is placed over the site afterward.

How do I prepare for the test?

Follow the imaging center's instructions, including any fasting or medication instructions. Tell the care team about kidney problems, prior contrast reactions, allergies, bleeding disorders, pregnancy, and medicines such as blood thinners, because these factors may affect the procedure or its safety.