title: Efficacy of gadolinium-diethylenetriaminepentaacetic acid-enhanced magnetic resonance imaging for differentiation between superficial and muscle-invasive tumor of the bladder: a comparative study with computerized tomography and transurethral ultrasonography.
abstract: Gadolinium-labeled diethylenetriaminepentaacetic acid (Gd-DTPA)-enhanced magnetic resonance imaging (MRI) was evaluated in an effort to clarify whether MRI could replace or be proved to be superior to computerized tomography (CT) and/or transurethral ultrasonography. A total of 57 bladder cancer patients was evaluated. MRI was performed with a superconducting magnet operating at 1.5 Tesla. The images acquired were multisections, having a fast spin-echo pulse sequence of less than a 14-second breath holding. Serial scans were performed before and immediately after Gd-DTPA venous injection. The findings on different imaging techniques were compared with the histological stagings. A proper diagnosis was made in 42 of 57 cases (73.7%) by Gd-DTPA-enhanced MRI, in 27 of 57 (47.4%) by CT and in 31 of 57 (54.4%) by transurethral ultrasonography when comparing the histological findings. The sensitivity and specificity for differentiating superficial and muscle-invasive tumor of each imaging method were, respectively, 96.2 and 83.3% in Gd-DTPA-enhanced MRI, 96.0 and 58.3% in CT, and 88.0 and 66.7% in transurethral ultrasonography. These data suggest that the staging of bladder cancer by Gd-DTPA-enhanced MRI appears to be superior and more accurate than the staging obtained by CT and transurethral ultrasonography.
authors.affiliation: Department of Urology, School of Medicine, Keio University, Tokyo, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Tachibana
authors.forename: S
authors.initials: S
authors.lastname: Baba
authors.forename: N
authors.initials: N
authors.lastname: Deguchi
authors.forename: S
authors.initials: S
authors.lastname: Jitsukawa
authors.forename: M
authors.initials: M
authors.lastname: Hata
authors.forename: H
authors.initials: H
authors.lastname: Tazaki
authors.forename: A
authors.initials: A
authors.lastname: Tanimoto
authors.forename: Y
authors.initials: Y
authors.lastname: Yuasa
authors.forename: K
authors.initials: K
authors.lastname: Hiramatsu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002278:Carcinoma in Situ / Q000473:pathology; D002295:Carcinoma, Transitional Cell / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D009942:Organometallic Compounds; D004369:Pentetic Acid; D011237:Predictive Value of Tests; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology
chemical_list: D009942:Organometallic Compounds; D004369:Pentetic Acid; D019786:Gadolinium DTPA