RESUMEN
INTRODUCTION: Transurethral resection of bladder tumor (TURBT) is a fundamental but challenging step in the diagnosis and treatment of non-muscle invasive bladder cancer (NMIBC). The first- and second-look TURBT are central in the management of T1 tumors. MATERIALS AND METHODS: We retrospectively reviewed all patients treated with TURBT for T1 urothelial cell carcinoma (UCC) of the bladder in one academic institution between 2007 and 2017. Quality of TURBT was evaluated based on the presence/absence of muscle on pathology report, the presence/absence of residual tumor on the second look and the occurrence of complications. Patient-, surgeon- and tumor-related factors were investigated for their association with TURBT quality. RESULTS: 283 patients were included. Second-look resection was performed after a mean delay of 54 days. Muscle was observed in 85.9% of the samples on the first TURBT. On the second-look resection, UCC was observed in 52.3% of the samples. 38 complications were reported after the first TURBT (13.4%). Surgeon's experience was the only factor significantly associated with occurrence of post-operative complications (OR = 0.40; p = 0.04). Location of the tumor at the bottom of the bladder was a risk factor for not finding muscle at pathological analysis (OR = 0.20; p = 0.06). Male gender, multiplicity and tumor located at the bottom of the bladder were significantly associated with residual disease on reTURBT. In multivariate analysis, only male gender (OR = 4.71; p = 0.02) and tumor multiplicity remained significant (OR for unique tumor = 0.36; p = 0.02). CONCLUSION: TURBT is a challenging procedure and surgeon's experience is crucial in reducing the rate of post-operative complications. Technical difficulties resulting from patient's gender, tumor location or number of tumors may be as important as oncological factors in deciding whether or not to perform a second-look resection.