title: A case of intraperitoneal immunoglobulin G4-related inflammatory pseudotumor.
abstract: The term inflammatory pseudotumor (IPT) has been used to describe inflammatory and fibrosing tumoral processes of an undetermined cause that may involve a variety of organ system. IgG4-related disease is a newly recognized fibroinflammatory condition characterized by IgG4-producing plasma cell expansion in affected organs and, often but not always, elevated serum IgG4 concentrations. IgG4-related IPTs, a subtype of IPT, are characterized by dense infiltration of IgG4-positive plasma cells and stromal fibrosis. The association between inflammatory pseudotumor and IgG4 was first reported with a regard to sclerosing pancreatitis. Despite there are many reports on intraperitoneal IPTs including both cellular and lymphoplasmacytic type, only a few cases have been confirmed to be IgG4-related. We experienced a case of intraperitoneal IgG4-related inflammatory pseudotumor in an 83-year-old woman presenting with epigastric pain and malaise. Surgical specimens revealed an IgG4-related inflammatory pseudotumor.
authors.affiliation: Department of Internal Medicine, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
authors.forename: In Ho
authors.initials: IH
authors.lastname: Moh
authors.forename: Jin Bae
authors.initials: JB
authors.lastname: Kim
authors.forename: Su Rin
authors.initials: SR
authors.lastname: Shin
authors.forename: Sung Won
authors.initials: SW
authors.lastname: Jung
authors.forename: Sang Hoon
authors.initials: SH
authors.lastname: Park
authors.forename: Jeong Won
authors.initials: JW
authors.lastname: Kim
authors.forename: Mi Kyung
authors.initials: MK
authors.lastname: Shin
authors.forename: Myung Seok
authors.initials: MS
authors.lastname: Lee
mesh_terms: D000369:Aged, 80 and over; D002097:C-Reactive Protein / Q000032:analysis; D005260:Female; D006104:Granuloma, Plasma Cell / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood*; D010950:Plasma Cells / Q000378:metabolism; D049268:Positron-Emission Tomography; D014057:Tomography, X-Ray Computed
chemical_list: D007074:Immunoglobulin G; D002097:C-Reactive Protein