There are several tests used to detect and stage kidney cancer:
Imaging studies such as a CT scan, ultrasound, MRI or intravenous pyelogram (IVP). CT scans are very useful for detecting kidney tumors. IVP, which involves injecting a dye that shows up on an X-ray as it travels through the urinary system, can be helpful in diagnosing kidney cancer. These imaging studies can also be used for disease staging to help oncologists determine the appropriate treatment.
Fine Needle Aspiration (FNA) involves the insertion of a long, thin needle into the kidney to take a tiny sample of tissue (biopsy) for examination under a microscope. FNA is generally used if other tests have failed to prove the presence of a tumor.