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1 From the Division of Abdominal Imaging and Intervention, Department of Radiology (S.G.S., Y.U.G., K.J.M., K.T.), and Division of Cytology, Department of Pathology (E.S.C.), Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115. Received January 14, 2005; revision requested March 17; revision received April 8; accepted May 2; final version accepted June 13; final review by S.G.S. January 19, 2006. Address correspondence to S.G.S. (e-mail: sgsilverman{at}partners.org).
Although percutaneous renal mass biopsy with cross-sectional imaging guidance has long been considered to be safe and accurate, there have been recent advances in imaging, interventional, and cytologic techniques that have increased the role of percutaneous biopsy in the diagnosis of renal masses. Today, biopsy plays a fundamental role in the care of patients with a renal mass. Biopsy results are used to confirm the diagnosis of renal cancers, metastases, and infections, and there is increasing evidence to suggest that biopsy can help subtype and grade many primary renal cancers. Because a considerable fraction of small solid renal masses are benign and do not need treatment, there is an increasing need to diagnose them. Biopsy after a full imaging work-up can help prevent unnecessary and potentially morbid surgical and ablation procedures in a substantial number of patients. Although more data are needed to understand the overall accuracy of biopsy for the diagnosis of benign lesions, many can be diagnosed with the aid of biopsy findings. This article reviews reported experience with percutaneous renal mass biopsy, discusses the technical factors that contribute to results, and details seven specific clinical settings that should prompt the clinician to consider percutaneous biopsy when encountering a renal mass.
© RSNA, 2006
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