title: CT and MR imaging findings of xanthogranulomatous cholecystitis: correlation with pathologic findings.
abstract: The aim of this study was to evaluate CT and MRI findings in xanthogranulomatous cholecystitis (XGC) and to correlate the imaging findings with various pathologic parameters. The study included 13 patients with histopathologically confirmed XGC. The CT ( n=13) and MRI ( n=5) obtained in these patients were evaluated retrospectively. On CT, low-attenuation areas in the wall of XGC correlated with foam and inflammatory cells or necrosis and/or abscess in XGC. Areas of iso- to slightly high signal intensity on T2-weighted images, showing slight enhancement at early phase and strong enhancement at last phase on dynamic study, corresponded with areas of abundant xanthogranulomas. Areas with very high signal intensity on T2-weighted images without enhancement corresponded with necrosis and/or abscesses. Luminal surface enhancement (LSE) of gallbladder wall represented preservation of the epithelial layer. The early-enhanced areas of the liver bed on dynamic CT and MR images corresponded with accumulation of inflammatory cells and abundant fibrosis. Our results indicate that CT and MRI findings correlate well with the histopathologic findings of XGC.
authors.affiliation: Department of Radiology, Oita Medical University, 879-5593 Oita, Japan. hosya@oita-med.ac.jp
authors.forename: Rieko
authors.initials: R
authors.lastname: Shuto
authors.forename: Hiro
authors.initials: H
authors.lastname: Kiyosue
authors.forename: Eiji
authors.initials: E
authors.lastname: Komatsu
authors.forename: Shunro
authors.initials: S
authors.lastname: Matsumoto
authors.forename: Katsunori
authors.initials: K
authors.lastname: Kawano
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Kondo
authors.forename: Shigeo
authors.initials: S
authors.lastname: Yokoyama
authors.forename: Hiromu
authors.initials: H
authors.lastname: Mori
mesh_terms: D000368:Aged; D002764:Cholecystitis / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology*; D005260:Female; D006099:Granuloma / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D014973:Xanthomatosis / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology*