To characterize the relationship of DDMVAC- and GC-specific COXEN scores in terms of pT0 rate at cystectomy in patients treated with neoadjuvant chemotherapy. This will be done in two ways:
By assessing whether the treatment-specific COXEN score is prognostic of pT0 rate or ¿ pT1 in this patient population and to assess in a preliminary fashion whether the COXEN score is a predictive factor distinguishing between these two chemotherapy regimens.
By evaluating the correlation between the GC- and the DDMVAC-COXEN score.
The primary focus of this study is to see if looking at tumor biomarkers using a program called coexpression extrapolation or "COXEN" may predict a patient's response to chemotherapy before surgery.