title: Immunoglobulin G4-related Retroperitoneal Fibrosis of the Pelvis.
abstract: Retroperitoneal fibrosis (RPF) is a rare disease characterized by the replacement of normal tissue with fibrosis and/or inflammation. In this case, a 68-year-old man presented with RPF in the pelvis, a rare location for this disease. Biopsies were performed, which showed elevated levels of C-reactive protein, erythrocyte sedimentation rate, and, most importantly, immunoglobulin G4 (IgG4). It has been postulated that IgG4-related sclerosing disease is a systemic disease. Treatment has been successful with systemic corticosteroids.
authors.affiliation: Division of Urology, Department of Surgery, The University of Arizona, Tucson, AZ.
authors.forename: Anthony
authors.initials: A
authors.lastname: Dyer
authors.affiliation: Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA.
authors.forename: Peter M
authors.initials: PM
authors.lastname: Sadow
authors.affiliation: Department of Pathology, The University of Arizona, Tucson, AZ.
authors.forename: Erika
authors.initials: E
authors.lastname: Bracamonte
authors.affiliation: Division of Urology, Department of Surgery, The University of Arizona, Tucson, AZ.
authors.forename: Matthew
authors.initials: M
authors.lastname: Gretzer
keywords: Retroperitoneal fibrosis; Serum immunoglobulin G4