Can CT Virtual Cystoscopy Replace Conventional Cystoscopy in Early Detection of Bladder Cancer?
Table 1
(a) Tumor detection in patients with bladder tumors: taking CPE as reference standard, CTVC falsely detects two patients with tumor lesion out of twenty-five with no lesion on CPE. Similarly, CTVC fails to detect two patients out of twenty-five with lesion positive on CPE. (b) Depicting the sensitivity and specificity of CTVC for bladder tumor detection.
(a)
Parameter
Positive result (tumor detected) ()
Negative result (tumor not detected) ()
True positive ()
True negative ()
False positive ()
False negative ()
CPE
25
25
25
25
0
0
CTVC
25
25
23
23
2
2
CPE: cystopanendoscopic examination was taken as reference standard, : number of patients, and CTVC: computed tomography virtual cystoscopy.
(b)
Parameter
Sensitivity
Specificity
Ppv
Npv
CTVC
92%
92%
92%
92%
Ppv: positive predictive value and Npv: negative predictive value.
