[Gadolinium-enhanced MR imaging, T2-weighted MR imaging, and transurethral ultrasonography].
OBJECTIVE
To assess the value and problems of dynamic gadolinium-enhanced MR imaging, T2-weighted MR imaging, and transurethral ultrasonography(TUUS) in staging of urinary bladder cancer.


METHODS
Dynamic gadolinium-enhanced MR imaging and FSE T2-weighted MR imaging of 64 patients with urinary bladder cancer who subsequently had surgery were retrospectively reviewed and compared with TUUS findings.


RESULTS
Specificity for muscular invasion was 90.5% with TUUS, significantly better than with dynamic MR imaging (64.9%) (p < 0.05). The rates of overestimation of superficial cancer(pT1) with dynamic MRI and T2-weighted MR imaging were 35.1%(13/37) and 24.3%(9/37), respectively. The staging accuracy of invasive cancer(pT2 or over) was 85.2% with dynamic MR imaging, which was better than the rate of 75.0% achieved with T2-weighted MR imaging.


CONCLUSIONS
Although TUUS was a better modality for diagnosing superficial cancer(pT1), dynamic MR imaging was found to be better for diagnosing invasive(pT2 or over) cancer.
Mizuno
K
K
Department of Radiology, Iwate Prefectural Central Hospital.
Sasaki
T
T
Saito
Y
Y
Itabashi
Y
Y
Miura
H
H
Yodono
H
H
Abe
Y
Y
Kawaguchi
T
T
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019160:Endosonography; D005260:Female; D005682:Gadolinium; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging
D005682:Gadolinium