title: [Comparison of MRI and CT X-ray in the evaluation of bladder cancer. Apropos of 26 cases].
abstract: 26 urothelial carcinomas studied with MRI and CT have been reviewed. The results are connected with surgical and histological data. The assessment of the size and number of tumoral sites is more accurate with MRI, which allows a correct assessment of bladder wall infiltration in 20 of the 22 tumors studied with T2-weighted sequences. The sensitivity of both techniques is the same for the invasion of fat (92%) and the involvement of neighboring organs (67%), although MRI seems to be more specific (85% and 95% for 77% and 89%). The results are similar for the study of lymph node invasion (71% sensitivity). The performances of MRI for the assessment of bladder cancer extension are therefore comparable to those of CT. The advantages of the former technique include the clearer visualization of the tumor itself, especially for cancers of the neck and dome of the bladder owing to exploration in several planes. In addition, it allows a reliable assessment of the degree bladder wall infiltration and differentiates tumors that are not or not very infiltrating from highly infiltrating tumors.
authors.affiliation: Service de Radiologie de l'Appareil Urinaire, Hôpital Necker, Paris.
authors.forename: J F
authors.initials: JF
authors.lastname: Chiche
authors.forename: T H
authors.initials: TH
authors.lastname: Dao
authors.forename: O
authors.initials: O
authors.lastname: Hélénon
authors.forename: D
authors.initials: D
authors.lastname: Di Stéfano
authors.forename: J F
authors.initials: JF
authors.lastname: Moreau
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002295:Carcinoma, Transitional Cell / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D014057:Tomography, X-Ray Computed; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology
vernacular_title: Comparaison IRM-TDM dans le bilan des cancers de vessie. A propos de 26 cas.