title: Retroperitoneal mass in a patient with Wegener's granulomatosis.
abstract: Wegener's granulomatosis (WG) is a necrotizing vasculitis that classically involves the upper and lower respiratory tracts and kidneys. Uncommonly, other sites may also be involved. We report on a patient previously diagnosed with and treated for WG who presented with flank pain and on further imaging was found to have a retroperitoneal mass. A surgical specimen of the tissue revealed multiple foci of necrotizing vasculitis. Consideration should be given to the possibility that mass-like lesions in patients with WG may not be tumors since the management and outcome differ from that of an active vasculitis.
authors.affiliation: Department of Medicine, Division of Nephrology, School of Medicine, State University of New York at Stony Brook, NY 11794, USA.
authors.forename: Jasmeet
authors.initials: J
authors.lastname: Kaur
authors.forename: Frederick
authors.initials: F
authors.lastname: Miller
authors.forename: Nand K
authors.initials: NK
authors.lastname: Wadhwa
authors.forename: Edward P
authors.initials: EP
authors.lastname: Nord
mesh_terms: D001706:Biopsy; D003937:Diagnosis, Differential; D021501:Flank Pain / Q000209:etiology; D014890:Granulomatosis with Polyangiitis / Q000150:complications* / Q000175:diagnosis / Q000188:drug therapy; D006801:Humans; D007166:Immunosuppressive Agents / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D009336:Necrosis; D011237:Predictive Value of Tests; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis*; D012187:Retroperitoneal Space / Q000473:pathology; D014057:Tomography, X-Ray Computed
chemical_list: D007166:Immunosuppressive Agents