The correlation of CT and pathologic staging in carcinoma of urinary bladder

Objective: To explore the error in CT and pathologic staging in carcinoma of urinary bladder and the method for correction. Methods: Based on the CT findings of 50 patients, primary bladder cancers were classified into 4 types according to TNM parameter. All cases were confirmed histologically. CT staging was compared with pathologic results. Results: CT staging included stage T1 13 cases,stage T2 17 cases,stage T3a 7 cases,stage T3b 5 cases,stage T4 6 cases. In addition, the tumor was missed in 1 case and in 1 case its stage could not be decided. The operation and pathologic staging including stage P1 16 cases,stage P2a 22 cases,stage P2b 5 cases,stage P3 2 cases,stage P4 5 cases. In 16 cases there were difference between CT staging and pathologic staging, in 1 case CT staging lower than pathology, in 2 cases CT failed to stage, 13 cases were over-stage. The accuracy of CT staging was 82%(41/50). The accuracy of pathologic staging was 86%(43/50). Conclusion: CT could diagnose T3b and T4 bladder cancers correctly. Based on pathology, the clinical staging of bladder cancers should combine CT to promote the accuracy of staging.