Can CT Virtual Cystoscopy Replace Conventional Cystoscopy in Early Detection of Bladder Cancer?

Table 2

(a) Number of tumors detected in patients: taking CPE as reference standard, out of 80 tumors detected on CPE, CTVC was able to detect 75 tumors accurately while five tumors were missed. Four tumors were falsely detected as positive on CTVC which were actually not present on CPE. (b) Depicting the sensitivity and specificity of CTVC in patients with respect to number of tumors detected.

(a)

Parameter	CTVC positive	CTVC negative
CPE positive	75	5
CPE negative	4	25

CPE: cystopanendoscopic examination was taken as reference standard and CTVC: computed tomography virtual cystoscopy.

(b)

Parameter	Sensitivity	Specificity	Ppv	Npv
CTVC	94.90%	83.30%	93.75	86.21

Ppv: positive predictive value and Npv: negative predictive value.