Renal tumor biopsies are associated with a low complication rate

AbstractBackground: Due to the high incidence of benign lesions in renal masses, numerous studies have been performed to clarify the value of core needle biopsies. The aim of the present study was to describe the complication rate after renal tumor biopsies (RTB), in order to make recommendations on observation after the procedure.Materials and methods: Data from all patients who underwent percutaneous ultrasound-guided RTB between February 2013 and October 2016 due to CT verified solid renal masses were prospectively collected and kept in a well-maintained database. Complications were collected retrospectively and classified according to the Clavien-Dindo (CD) classification system.Results: Data from 224 consecutive patients were retrieved. Thirteen patients underwent unilateral repeat biopsies and three patients underwent bilateral biopsies; thus, a total of 240 procedures were analyzed. A total of 124 patients (51.7%) were discharged within 4 hours after the RTB procedures and 110 patients (45.8%) were...