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Assessment of the accuracy of C.T. staging of bladder tumours.

Although C.T. is useful in staging bladder tumours it is only as accurate as the resolution of the scanner. Non-enlarged, involved lymph nodes cannot be identified, and interpretation can be inaccurate in the presence of poorly defined tissue planes, for example, post surgery, radiotherapy or if the structures are contiguous. However, C.T. is useful in demonstrating enlarged nodes not detected clinically and it remains a useful tool in staging bladder tumours. 
 
 
 
The C.T. appearances of bladder tumours in forty-nine patients were reviewed and correlated with either cystectomy and postmortem findings, or biopsy and clinical findings. 
 
 
 
The ability of C.T. to detect spread of tumour through the bladder wall or adjacent or retroperitoneal nodes was assessed retrospectively. Sources of error in original interpretations were identified.