title: IgG4-related disease in the abdomen: a great mimicker.
abstract: IgG4-related disease is a systemic disorder that can involve various abdominal organs. Abdominal manifestations include autoimmune pancreatitis, sclerosing cholangitis, gallbladder pseudotumours, multifocal renal abnormalities, retroperitoneal fibrosis, and sclerosing mesenteritis. Radiological appearances of the IgG4-related disease often resemble malignant tumors and other inflammatory processes, potentially leading to unnecessary invasive procedures. Moreover, a timely diagnosis of IgG4-related disease leads to an effective treatment with steroids. Therefore, it is important to understand the spectrum of imaging manifestations of IgG4-related disease and their differentiating features from other diagnoses.
authors.affiliation: Department of Medical Imaging, University of Toronto, Toronto, Ontario, Canada.
authors.forename: Hassan
authors.initials: H
authors.lastname: Al Zahrani
authors.affiliation: Department of Medical Imaging, University of Toronto, Toronto, Ontario, Canada. Electronic address: taekyoung.kim@uhn.ca.
authors.forename: Tae
authors.initials: T
authors.lastname: Kyoung Kim
authors.affiliation: Department of Medical Imaging, University of Toronto, Toronto, Ontario, Canada.
authors.forename: Korosh
authors.initials: K
authors.lastname: Khalili
authors.affiliation: Department of Medical Imaging, University of Toronto, Toronto, Ontario, Canada.
authors.forename: Paraskevi
authors.initials: P
authors.lastname: Vlachou
authors.affiliation: Department of Medical Imaging, QE2 Hospital, Grande Prairie, Alberta, Canada.
authors.forename: Hojun
authors.initials: H
authors.lastname: Yu
authors.affiliation: Department of Medical Imaging, University of Toronto, Toronto, Ontario, Canada.
authors.forename: Hyun-Jung
authors.initials: HJ
authors.lastname: Jang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001327:Autoimmune Diseases / Q000175:diagnosis* / Q000276:immunology*; D003937:Diagnosis, Differential; D003951:Diagnostic Errors / Q000517:prevention & control*; D003952:Diagnostic Imaging / Q000379:methods*; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D010265:Paraproteinemias / Q000175:diagnosis* / Q000276:immunology*
chemical_list: D007074:Immunoglobulin G