Recurrent bladder tumors after transurethral resection: Diagnostic yield of MDCT-virtual cystoscopy

Abstract

Purpose: To evaluate the diagnostic efficacy of computed tomography-virtual cystoscopy in the depiction of recurrent bladder tumors after transuretehral resection (TUR) and compare its results with those of standard invasive conventional cystoscopy. Patients and methods: From December 2013 to June 2016, 33 patients (26 males, 7 females), with mean age 62.76 ± 10.45 years, who were coming for routine follow up following transurethral resection of malignant bladder masses or complaining of recurrent postoperative hematuria were included in the study. Computed tomography virtual cystoscopy (CT-VC) was performed for all patients followed by conventional cystoscopy (CC) within maximum three days. The results of both studies were carefully analysed and compared for presence of lesions, their size, location, morphology and signs of local invasion. Additional information obtained from CT source images included features of extravesical extension, presence of locoregional lymph nodes or distant metastases. Results: The sensitivity, specificity, PPV and NPV of CT-VC for the detection and characterization of recurrent bladder lesions were 82.8%, 81.8%, 93.5% and 60% respectively. The diagnostic results varied significantly (P = 0.03 and 0.037) between CC and axial supine and prone MDCT images and was not significant (P = 0.99) between CC and CT-V. Conclusions: CT-VC is a minimally invasive method to detect recurrent bladder tumors after transurethral resection and is advised as a routine follow-up study.

Keywords

• Cystoscopy
• Virtual
• CT
• Recurrent bladder carcinoma
• Conventional