You have accessJournal of UrologyCME1 May 2022PD15-10 LONG TERM FOLLOW UP IN PATIENTS UNDERGOING RENAL BIOPSY - SEEDING IS NOT ANECDOTAL Michael Staehler, Melaine Schott, Alexander Tamalunas, Chistian Stief, Annabel Graser, and Severin Rodler Michael StaehlerMichael Staehler More articles by this author , Melaine SchottMelaine Schott More articles by this author , Alexander TamalunasAlexander Tamalunas More articles by this author , Chistian StiefChistian Stief More articles by this author , Annabel GraserAnnabel Graser More articles by this author , and Severin RodlerSeverin Rodler More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000002547.10AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: M. Staehler, M. Schott, A. Tamalunas, C. Stief, A. Graser, S. RodlerRenal biopsy is recommended if its outcome might alter therapeutic decisions in unclear renal masses or to include patients into active surveillance protocols. Little is known about long term results and follow up. METHODS: Retrospective analysis of an institutional database at a tertiary referral center including patients between 2003 and 2005 with a follow-up of at least 15 years. Renal biopsies were taken percutaneously with a coaxial technique according to guideline recommendations with an off-line guided ultrasound approach. RESULTS: We identified n=106 patients who underwent renal biopsy with an unclear renal mass. Median age of 58.7 years (43.7-66.2). Patients had a median of 4.2 (3-6) biopsies taken at the initial time of diagnosis. In 6 patients tumor seeding leading to local growth of lesions was identified after a median time of 8.2 years. Four lesions were resected and had the same histology as the biopsy result without further recurrence. In 45 pts the result of the biopsy revealed a histology that led to a different therapy but surgery (n=28 lymphoma, n=6 metastasis from other malignancies, n=11 oncocytoma). 61 patients were treated for their renal cell carcinoma with either surgery or ablation. No patient developed metastatic spread related to seeding. CONCLUSIONS: In a large proportion of patients, the result of the biopsy changed the therapy.Indication for renal biopsy should be discussed carefully as seeding does not seem to be anecdotal in long-term follow-up. Source of Funding: This work was submitted and accepted for AUA 2020 but could not have been presented due to the pandemic © 2022 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 207Issue Supplement 5May 2022Page: e266 Advertisement Copyright & Permissions© 2022 by American Urological Association Education and Research, Inc.MetricsAuthor Information Michael Staehler More articles by this author Melaine Schott More articles by this author Alexander Tamalunas More articles by this author Chistian Stief More articles by this author Annabel Graser More articles by this author Severin Rodler More articles by this author Expand All Advertisement PDF DownloadLoading ...