Preliminary results of a randomized phase III trial comparing streptozotocin plus fluorouracil versus interferon for metastatic carcinoid tumors (FNCLCC - FFCD 9710)
4090 Background: Streptozotocin and 5 FU in combination is widely used for the treatment of advanced carcinoids tumors. Interferon is an effective treatment of the malignant carcinoids tumors. This randomized multicenter phase III trial compared those treatments in patients with metastatic carcinoïd tumors. Methods: Patients with metastatic carcinoid tumors, clinical or biological progression, WHO status 0–2 (PS) and age ≤ 75 years were randomized 1:1 between interferon alpha 2a recombinant (3MU × 3 per weeks) and 5FU (400 mg/m2/day day1 to day5) plus streptozotocin (500 mg/m2/day day1 to day5) every 6 weeks. Stratification was done according to center, PS and anterior treatment. Primary endpoint was progression free-survival (PFS). It was required to include 120 pts and to observe 38 progressions to detect an expected improvement in 1year PFS from 55% to 80% (bilateral α = 5 % and β = 20 %). Secondary endpoints included 1-year and 2-year overall survival (OS). Intent to treat analyses were performed. Results: From February 1998 to june 2004, in 23 centers, 63 patients has been included, 32 in 5FU-STZ arm and 32 in interferon arm: median age (59 years [37–77] vs 63 [39–75]), male/female ratio (1.2 vs 1), PS 0–1 (91% vs 97%), anterior chemotherapy (13% vs 16%), surgery (69% vs 59%), radiotherapy (6% vs 0%) are well balanced between arms. The median number of 5FU-STZ and Interferon cycles was respectively 5 and 4. After a median follow-up of 26 months, the median OS for interferon was 44.3 months versus 37.7 months for chemotherapy: HR = 0.90 [0.43–1.90]; 1- year and 2-year survival rates were 89% and 72% for interferon versus 84% and 73% for chemotherapy. Conclusions: Interferon alpha 2a does not prolong OS in advanced metastatic carcinoid tumors as compared to the combination of 5FU-streptozotocin. After checking clinical and biological progression, PFS analyses will be presented at the meeting. No significant financial relationships to disclose.