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Image-guided radiofrequency ablation of Bosniak category III or IV cystic renal tumors: initial clinical experience

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Abstract

The purpose of this study was to assess the efficacy of image-guided radiofrequency (RF) ablation of cystic renal tumors. Between November 2005 and August 2007, computed tomography (CT) or ultrasound-guided RF ablation was performed in nine patients with 14 Bosniak category III (n = 5) or IV (n = 9) cystic renal tumors using an internally cooled RF ablation system. We evaluated the number of sessions, cycles and duration of energy application, treatment results, lesion size change, and complications. Together the cystic renal tumors required 15 sessions and 23 cycles of energy application. The duration of energy application per one tumor ablation ranged from 1 to 12 min (mean 6 min). The last follow-up CT indicated complete coagulation of 14/14 (100%) lesions. None of these tumors had recurred within 1–19 months (mean 8 months). The maximum diameter of the cystic renal tumors was significantly reduced from 2.5 ± 0.6 cm before ablation to 1.7 ± 0.7 cm at the last follow-up CT (P < 0.01). Complications were pneumothorax (n = 2), inguinal paresthesia (n = 1), and arteriovenous fistula (n = 1). Image-guided RF ablation is an effective treatment for Bosniak category III or IV cystic renal tumors, which might need relatively shorter duration of energy application than purely solid renal tumors of the same size.

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Authors and Affiliations

  1. Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-ku, Seoul, 135-710, Korea

    Byung Kwan Park & Chan Kyo Kim

  2. Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea

    Hyun Moo Lee

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  1. Byung Kwan Park
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  2. Chan Kyo Kim
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  3. Hyun Moo Lee
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Correspondence to Byung Kwan Park.

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Park, B.K., Kim, C.K. & Lee, H.M. Image-guided radiofrequency ablation of Bosniak category III or IV cystic renal tumors: initial clinical experience. Eur Radiol 18, 1519–1525 (2008). https://doi.org/10.1007/s00330-008-0891-3

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  • DOI: https://doi.org/10.1007/s00330-008-0891-3

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