- Pure or mixed variant urothelial carcinoma o Allowable mixed variant subtypes include: squamous differentiation glandular differentiation nested pattern microcystic micropapillary lymphoepthelioma-like plasmacytoid and lymphoma-like sarcomatoid/carcinosarcoma giant cell trophoblastic differentiation clear cell lipid cell undifferentiated Radical cystectomy and pelvic lymph node dissection within the prior 48 weeks Pathologic T3 or higher stage disease, N0-2, M0 (AJCC, 7th Ed., Appendix C) No clinical evidence of residual or recurrent disease based on the following minimum diagnostic work-up within 8 weeks of a patients consent to participate.