Optimization of 5-fluorouracil (5-FU)/cisplatin combination chemotherapy with a new schedule of leucovorin, 5-FU and cisplatin (LV5FU2-P regimen) in patients with biliary tract carcinoma

Background: Unresectable biliary tract carcinoma (BTC) is associated with a very poor prognosis. To improve efficacy and tolerance of the 5-fluorouracil (5-FU)/cisplatin combination in BTC, we designed a new therapeutic schedule, the LV5FU2-P regimen. Patients and methods: Twenty-nine patients with advanced or metastatic BTC were prospectively enrolled in the study. The treatment (LV5FU2-P regimen) consisted of a biweekly administration of a 2‐h infusion of leucovorin 200 mg/m2, a 400 mg/m2 bolus of 5-FU followed by a 22-h continuous infusion of 600 mg/m2 5-FU on two consecutive days and cisplatin 50 mg/m2 on day 2. Clinical symptoms, performance and weight changes were monitored. Results: Objective responses were observed in 10 patients (34%) (95% confidence interval 23% to 45%) including one complete response and nine partial responses (stabilization 38%, progression 28%). Median progression-free survival and overall survival were 6.5 and 9.5 months, respectively. Weight gain was observed in 45% of patients and performance status improved in 60%. One patient had a grade 4 thrombocytopenia, and grade 3 toxicity occurred in 41% of patients. There were no treatment-related deaths. Conclusions: This study, one of the largest phase II trials performed for this disease, shows that the LV5FU2-P regimen is an active and well-tolerated chemotherapy for advanced and metastatic BTC.