title: [IgG4-related idiopathic retroperitoneal fibrosis: a case report].
abstract: A 75-year-old man visited our hospital with the complaint of lumbago due to bilateral hydronephrosis. Computed tomographic (CT) scan revealed a thick and homogeneous retroperitoneal soft-tissue mass with isodensity to the muscle, which extended from around the kidneys to the bladder. His serum IgG4 level was extremely high. He also had proptosis. He was diagnosed as having retroperitoneal fibrosis due to IgG4- related sclerosing disease, and treated with glucocorticoid and azathioprine. After 2 months, partial regression of the mass was observed.
authors.affiliation: The Department of Urology, St. Luke's International Hospital.
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Oguchi
authors.forename: Masato
authors.initials: M
authors.lastname: Okada
authors.forename: Fumiyasu
authors.initials: F
authors.lastname: Endo
authors.forename: Kazunori
authors.initials: K
authors.lastname: Hattori
authors.forename: Akiko
authors.initials: A
authors.lastname: Fujisaki
authors.forename: Masaomi
authors.initials: M
authors.lastname: Ikeda
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Shiga
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yashi
authors.forename: Osamu
authors.initials: O
authors.lastname: Muraishi
mesh_terms: D000368:Aged; D001327:Autoimmune Diseases / Q000150:complications*; D006801:Humans; D007074:Immunoglobulin G / Q000276:immunology*; D008297:Male; D012185:Retroperitoneal Fibrosis / Q000175:diagnosis / Q000209:etiology* / Q000276:immunology
chemical_list: D007074:Immunoglobulin G