 
          Conclusions about I-O and 2 Line
        
        
          Patients with mUC that have progressed to previous platinum-containing
        
        
          regimens have poor prognosis, with few treatment options
        
        
          Increasing evidence suggests that checkpoint inhibitors are an effective
        
        
          treatment strategy in these context
        
        
          We currently have Phase  I-III evidence to support this approach that most
        
        
          likely will change the natural history of mUC
        
        
          Yet, a substantial proportion of patients will not benefit from this strategy
        
        
          and efforts should be devoted to uncover valid predictive tools