296 Background: First-line regimens for mTCC of the bladder are either MVAC (methotrexate, vinblastine, doxorubicin, and cisplatin) or the cisplatinum-gemcitabine doublet. There is no approved second-line option for mTCC. Both single agent D and O have response rates of 10 to 20%, and O in cisplatin-resistant patients (pts). Hence the combination of D and O may be useful in recurrent mTCC. Methods: The combination of D and O was primarily tested for efficacy in recurrent mTCC. All pts had histologically proven TCC with measurable disease, and had prior treatment with at least 1 platinum-containing regimen. D 60 mg/m2 followed by O 110 mg/m2 were administered every 3 weeks. Pts were evaluated for response every 2 cycles and were treated either till progression or for a maximum of 6 cycles. Results: 22 pts were enrolled of whom 19 were evaluable for response. Median age was 72 years (range 44 – 87). All pts had prior treatment with at least 1 cytotoxic regimen, with 8 pts having received 2 or more prior regimens. The mean number of cycles administered was 3. Of the 19 pts evaluable for efficacy, objective response was documented in two pts (both partial responses), three had stable disease, and the remaining fourteen progressed on therapy for an overall disease stabilization rate of 26%. Median time to progression (TTP) was 3.0 months (95% CI 0.2 to 5.8) and median overall survival (OS) was 7.0 months (95% CI 4.6 to 9.4). Toxicity, evaluated in all 22 patients, was relatively mild: grade 3-4 diarrhea in 6 patients, grade 3-4 hematological toxicity in 4 pts and grade 3-4 fatigue in 1 pt. No grade 3-4 neuropathy was observed and no toxic deaths were noted. The median follow-up period was 7.0 months (95% CI 4.5 to 9.5). Conclusions: The combination of D and O is active in previously treated pts with mTCC. This regimen appears to be well tolerated with overall mild toxicity. Whilst this study was not powered for assessing survival, the presence of stable disease in 26% of pts suggests that further investigation of the combination in carefully selected pts maybe warranted.