title: IgG4 disease: The great masquerader.
abstract: Systemic IgG4 disease can have a wide spectrum of clinical presentation, which can mimic several other disease entities. In this report, we describe a series of two patients with IgG4-related disease who were referred to us initially with the diagnosis of acute cholecystitis and the second patient with metastatic pancreatic adenocarcinoma with peritoneal metastasis respectively.
authors.affiliation: Department of Gastroenterology and Hepatology, Digestive Disease Institute, Cleveland Clinic, Cleveland, Ohio, United States.
authors.forename: Divya
authors.initials: D
authors.lastname: Yadav
authors.affiliation: Department of Anatomic Pathology, Cleveland Clinic, Cleveland, Ohio, United States.
authors.forename: Xiuli
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Gastroenterology and Hepatology, Digestive Disease Institute, Cleveland Clinic, Cleveland, Ohio, United States. Electronic address: chahalp@ccf.org.
authors.forename: Prabhleen
authors.initials: P
authors.lastname: Chahal
mesh_terms: D000368:Aged; D001327:Autoimmune Diseases / Q000097:blood / Q000175:diagnosis* / Q000188:drug therapy; D041881:Cholecystitis, Acute / Q000188:drug therapy / Q000209:etiology; D003937:Diagnosis, Differential; D005938:Glucocorticoids / Q000627:therapeutic use; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood*; D041781:Jaundice, Obstructive / Q000188:drug therapy / Q000209:etiology; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000175:diagnosis; D010195:Pancreatitis / Q000188:drug therapy / Q000209:etiology; D010950:Plasma Cells / Q000378:metabolism; D011241:Prednisone / Q000627:therapeutic use
chemical_list: D005938:Glucocorticoids; D007074:Immunoglobulin G; D011241:Prednisone