title: Office-based Ultrasound-guided Renal Core Biopsy Is Safe and Efficacious in the Management of Small Renal Masses.
abstract: To evaluate the safety and efficacy of ultrasound (US)-guided percutaneous renal mass biopsy (RMB) performed in the office setting by urologists.
  
  
  
  This is a retrospective study involving patients who underwent office-based US-guided percutaneous RMB between April 2010 and October 2015. Baseline vital signs and US were performed prior to the procedure. Patients were then observed for 1 hour after the procedure and repeat vital signs and US were performed. Hemodynamically stable patients who did not develop hematoma were discharged.
  
  
  
  In 108 patients, 70 (64.8%) were male, median age was 69.5 years, and median mass size was 3.3 cm (interquartile range: 2.5-4.6). Biopsy yield was as follows: 72 (66.7%) had renal cell carcinoma, 14 (13.0%) had benign renal parenchyma, 11 (10.2%) had oncocytoma, 6 (5.6%) had angiomyolipoma, 2 (1.9%) had lymphoma, and 3 (2.8%) had other disease. The initial nondiagnostic rate was 14 of 108 (13.0%). There were 28 of 108 (25.9%) patients observed whereas 79 of 108 (73.2%) received surgery or ablative therapy. Final pathology was concordant with biopsy results in 66 of 68 (97.1%) cases. Three patients experienced a grade I Clavien-Dindo surgical complication, all of which were managed conservatively.
  
  
  
  Office-based US-guided RMB is safe and efficacious in the management of appropriately selected SRM. It potentially offers improved dynamic characterization of solid renal mass, greater convenience to patients, as well as cost savings. Further studies are needed to evaluate this promising technique.
authors.affiliation: Beaumont Health System, Department of Urology, Royal Oak, MI. Electronic address: Chirag.Dave@beaumont.edu.
authors.forename: Chirag N
authors.initials: CN
authors.lastname: Dave
authors.affiliation: Beaumont Health System, Department of Urology, Royal Oak, MI; Oakland University William Beaumont School of Medicine, Rochester, MI; Michigan Institute of Urology, Troy, MI.
authors.forename: Brian
authors.initials: B
authors.lastname: Seifman
authors.affiliation: Beaumont Health System, Department of Urology, Royal Oak, MI.
authors.forename: Avinash
authors.initials: A
authors.lastname: Chennamsetty
authors.affiliation: Michigan Institute of Urology, Troy, MI.
authors.forename: Rene
authors.initials: R
authors.lastname: Frontera
authors.affiliation: Oakland University William Beaumont School of Medicine, Rochester, MI.
authors.forename: Kassem
authors.initials: K
authors.lastname: Faraj
authors.affiliation: McLaren Macomb Hospital, Macomb, MI.
authors.forename: Ryan
authors.initials: R
authors.lastname: Nelson
authors.affiliation: Michigan Institute of Urology, Troy, MI.
authors.forename: Colleen
authors.initials: C
authors.lastname: Lucido
authors.affiliation: Beaumont Health System, Department of Urology, Royal Oak, MI; Michigan Institute of Urology, Troy, MI.
authors.forename: Edward W
authors.initials: EW
authors.lastname: Schervish
mesh_terms: D000368:Aged; D000556:Ambulatory Surgical Procedures; D062005:Biopsy, Large-Core Needle / Q000009:adverse effects / Q000379:methods; D005260:Female; D006801:Humans; D061705:Image-Guided Biopsy / Q000009:adverse effects; D007668:Kidney / Q000000981:diagnostic imaging* / Q000473:pathology*; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D018084:Ultrasonography, Interventional