LAUSR

available at http://www.ncbi.nlm.nih.gov/pubmed/30645159 Editorial Comment: These authors evaluated 195 patients who underwent ultrasound guided renal mass biopsy. Of the 195 renal masses 11 were completely hilar in origin. Bleeding after biopsy was seen more frequently in patients with a renal hilar mass (4 of 11), and postprocedural bleeding correlated with percentage of renal sinus involvement. Overall bleeding complication rate was approximately 8%. The authors conclude that cases with renal mass biopsy in the hilar region had minor complications that were all successfully managed conservatively. They note that the number of hilar renal mass biopsies was relatively small. All hilar masses were subjected to core biopsy using an 18 gauge needle with or without a 17 gauge introducer. Pathological findings included renal cell carcinoma, oncocytoma and urothelial carcinoma, with no angiomyolipomas or lymphomas recorded in this small series.