A Trial of Cabazitaxel for Advanced Transitional Cell Carcinoma (TCC)

Inclusion Criteria: * Ages eligible for this study are 18 years and older. * Histological or cytological diagnosis of urothelial carcinoma. Mixed histologies are permitted as long as transitional cell carcinoma is the major component (i.e. \> 50% of the pathologic specimen). Pure or predominant squamous cell carcinomas are not permitted. * Patients with transitional cell carcinomas of the renal pelvis and ureter are permitted. * Patients must have metastatic or locally advanced unresectable disease. * Patients must have received one and only one prior chemotherapeutic regimen which included platinum (at least one cycle) for metastatic/recurrent disease. Neoadjuvant or adjuvant chemotherapy will be considered to have been first line if the patient progressed within 12 months of the last dose. * Patients with disease progression more than 12 months following platinum based chemotherapy can be included (rather than platinum re-challenge), according to the investigator's judgment. * ECOG performance status ≤ 2 * Estimated life expectancy of \> 12 weeks. * Patients must have measurable disease according to RECIST1.1 criteria. * If female of childbearing potential, pregnancy test is negative within 8 days priors to first dose of study drug. * If fertile, patient agrees to use an effective method of contraception to avoid pregnancy for the duration of the study. * Adequate organ function; Absolute neutrophil count ≥1.5 x 109/L. Platelet count ≥ 100 x109/L. Hemoglobin ≥ 9 g/dL. Total bilirubin ≤1.0x upper limit of normal. AST/SGOT and/or ALT/SGPT ≤ 2.5x upper limit of normal. Calculated creatinine clearance \> 40 ml/min (creatinine clearance will be calculated according to CKD-EPI formula: http://www.qxmd.com/calculate-online/nephrology/ckd-epi-egfr).(27) * Able to give informed consent. Exclusion Criteria: * Prior taxane therapy. * Pregnant or lactating females * Uncontrolled brain or leptomeningeal involvement (treated brain metastasis permitted if both known lesions and medications e.g. steroids for that indication are stable). * History of serious or concurrent illness that might be aggravated by study treatment. * Known human immunodeficiency virus (HIV) infection or active hepatitis B/C. * History of class II-IV congestive heart failure. * Significant renal impairment. * Uncontrolled hematuria. * History of severe hypersensitivity reaction (≥grade 3) to docetaxel. * History of severe hypersensitivity reaction (≥grade 3) to polysorbate 80 containing drugs. * Concurrent or planned treatment with strong inhibitors or strong inducers of cytochrome P450 3A4/5 (a one week wash-out period is necessary for patients who are already on these treatments) (see Appendix). * Other malignancies except adequately controlled basal cell carcinoma of the skin or carcinoma in situ of the cervix or incidental prostate cancer (T1a, Gleason \< 7 PSA \< 10ng/ml) or any other tumor within 2 years prior to enrollment. * Other investigational therapy or radiation therapy within 30 days before registration. * Patients not willing to employ adequate contraception for the duration of the study.