Differentiation of Bosniak Categories IIF and III Cystic Masses: What Radiologists Should KnowPark, Byung Kwan MD; Kim, Chan Kyo MD; Kim, Eun Young MDJournal of Computer Assisted Tomography: November-December 2010 - Volume 34 - Issue 6 - p 847-854 doi: 10.1097/RCT.0b013e3181ee9e02 Abdominal Imaging Abstract Author Information Based on a review of the literature, we describe old and new features that both old and new radiologists should be aware of (a) to determine which imaging features affect the differentiation of categories IIF and III masses, (b) to show imaging features of benign cystic renal masses preoperatively diagnosed as category III, and (c) to introduce imaging techniques that help to differentiate categories IIF and III masses without requiring the use of CT or magnetic resonance contrast material. From the Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. Received for publication April 28, 2010; accepted June 21, 2010. Reprints: Byung Kwan Park, MD, Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon−dong, Kangnam-ku, Seoul, Korea 135-710 (e-mail: firstname.lastname@example.org). © 2010 Lippincott Williams & Wilkins, Inc.