Metric sub‐stage according to micro and extensive lamina propria invasion improves prognostics in t1 bladder cancer: pd48‐05

presence of concomitant CIS, and muscle in the specimen were analysed in order to evaluate risk factors of residual disease at re-TUR, both in univariate analyses and multivariate logistic regressions. RESULTS: The following were not risk factors for residual disease: age, gender, tumour status and previous intravesical chemotherapy. The following were univariate risk factors for presence of residual disease: no muscle in TUR, multiple tumours, tumours > 3 cm, and presence of concomitant CISDue to the correlation between tumor multi-focality and tumor size, the multivariate model retained either the number of tumors or the tumor diameter (but not both), p < 0.001. The presence of muscle in the specimen was no longer significant, p 1⁄4 0.15, while the presence of CIS only remained significant in the model with tumor size, p < 0.001. CONCLUSIONS: The most significant factors for a higher risk of residual disease at re-TUR in T1G3 patients are multifocal tumours and tumoursmore than 3 cm. Patients with concomitant CIS and thosewithout muscle in the specimen also have a higher risk of residual disease.