الفهرس 
Anatomy of the Urinary BladderOnly 14 pages are availabe for public view
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Abstract
MR imaging is the first modality of choice in imaging of urinary bladder tumours with an accuracy of 73–96% according to previous studies. Our study showed 93% sensitivity (26 out of 28 patients were detected positive for bladder tumours) and 64% specificity (18 out of 28 were precisely diagnosed). MR imaging with dynamic gadolinium enhancement readily shows the extent of bladder tumour and the involvement of adjacent organs. Clinical staging, including transurethral resection, can assess involvement of deep muscle, but staging is inaccurate in detecting extravesical disease. Patients with extravesical tumours show significantly higher recurrence rates and lower survival rates compared with those who have organ-confined tumours. MR bladder imaging thus plays a critical role in improving staging accuracy.
Although overall staging accuracy was only moderate in our study (63%), the accuracy for differentiating superficial (below pT2b = 7 out of 8 patients = 87.5%) versus invasive (pT2b and above = 18 out of 20 patients = 90%) disease and organ-confined (below pT3a = 15 out of 17 patients = 88%) versus non-organ-confined (pT3a and above = 9 out of 11 patients = 82%) disease was relatively high.