title: Actinomycosis of the gallbladder mimicking carcinoma: a case report with US and CT findings.
abstract: We describe a case of actinomycosis of the gallbladder mimicking carcinoma. Sonography showed a hypoechoic mass replacing gallbladder lumen and engulfing a stone; contrast-enhanced computed tomography showed a heterogeneously enhanced thickened gallbladder wall with subtle, disrupted luminal surface enhancement, which formed a mass. As a result of the clinical and radiologic presentation, our impression was of gallbladder carcinoma. Actinomycosis should be included in the differential diagnosis when sonography and computed tomography findings show a mass engulfing the stone in the gallbladder and extensive pericholecystic infiltration with extension to neighboring abdominal wall muscle.
authors.affiliation: Department of Radiology, Wonju Christian Hospital, Wonju College of Medicine, Yonsei University, Wonju, Korea.
authors.forename: Young Han
authors.initials: YH
authors.lastname: Lee
authors.forename: Seong Hyun
authors.initials: SH
authors.lastname: Kim
authors.forename: Mee-Yon
authors.initials: MY
authors.lastname: Cho
authors.forename: Byoung Seon
authors.initials: BS
authors.lastname: Rhoe
authors.forename: Myung Soon
authors.initials: MS
authors.lastname: Kim
mesh_terms: D000196:Actinomycosis / Q000000981:diagnostic imaging* / Q000601:surgery; D000368:Aged; D002763:Cholecystectomy; D003287:Contrast Media; D003937:Diagnosis, Differential; D005705:Gallbladder Diseases / Q000000981:diagnostic imaging* / Q000382:microbiology / Q000601:surgery; D005706:Gallbladder Neoplasms; D006801:Humans; D008297:Male; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography
chemical_list: D003287:Contrast Media