title: A Case of Amyloidosis Presenting as Chronic Cholecystitis, Misdiagnosed as Polymyalgia Rheumatica.
abstract: Amyloidosis is a rare disease defined by extracellular deposits of amorphous fibrillar proteins, derived from aggregations of misfolded proteins. Localization of amyloidosis in the gallbladder is uncommon; only eight cases have been reported. We describe a case of amyloidosis diagnosed by cholecystectomy, which possibly also affected the liver and kidney. The patient was misdiagnosed with polymyalgia rheumatica, but after a cholecystectomy to treat chronic cholecystitis, we ultimately diagnosed him with amyloidosis. We review amyloidosis with gallbladder involvement in the literature.
authors.affiliation: Department of Gastroenterology, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Yoo Jin
authors.initials: YJ
authors.lastname: Um
authors.affiliation: Department of Rheumatology, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Hyoun Ah
authors.initials: HA
authors.lastname: Kim
authors.affiliation: Department of Gastroenterology, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Jin Hee
authors.initials: JH
authors.lastname: Jung
authors.affiliation: Department of Gastroenterology, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Hundo
authors.initials: H
authors.lastname: Cho
authors.affiliation: Department of Gastroenterology, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Joon Koo
authors.initials: JK
authors.lastname: Kang
mesh_terms: D000005:Abdomen / Q000000981:diagnostic imaging; D000368:Aged; D000686:Amyloidosis / Q000175:diagnosis*; D002764:Cholecystitis / Q000175:diagnosis* / Q000473:pathology; D002908:Chronic Disease; D003951:Diagnostic Errors; D005704:Gallbladder / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D011111:Polymyalgia Rheumatica / Q000175:diagnosis; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography
keywords: Amyloidosis; Cholecystitis; Gallbladder