Chemoradiation with FOLFOX plus cetuximab in locally advanced cardia or esophageal cancer: Final results of a GERCOR phase II trial (ERaFOX).
8 Background: Chemoradiotherapy (CRT) for locally advanced cardia and esophageal cancer is based on 5-FU combined with cisplatin, which could be favorably replaced by oxaliplatin (Ox). Cetuximab (C) has demonstrated synergism with both radiotherapy (RT) and platinum-based chemotherapy. ERaFOX trial was evaluating the safety and efficacy of the addition of C to CRT with FOLFOX. Methods: Main inclusion criteria were: stage III squamous cell or adenocarcinoma of the esophagus or gastroesophageal junction; WHO PS 0-1; age 18-80 years; weight loss <15% in the last 6 months. Patients (pts) received 2 cycles of FOLFOX induction therapy (Ox 85 mg/m2/d1, folinic acid 400 mg/m2/d1, 5-FU 2,400 mg/m2/d1-2, q2w) plus C (first infusion 400 mg/m2 then 250 mg/m2, q1w), then RT 50.4 Gy (1.8Gy/d x 28 fractions) with FOLFOX plus C (same doses, except 5-FU 1,800mg/m2/d1-2). Tumor evaluation was performed at the end of CRT (RECIST and endoscopic ultrasonography). The primary endpoint was overall response rate (ORR), with a 50% threshold for efficacy (Simon Minimax two-stage design). Results: From Nov 2007 to Feb 2010, 80 pts were enrolled in 12 centers. The characteristics of the 79 eligible pts were (1 ineligible pt for stage IV disease): male/female 60/19, median age 63 (23-79), PS 0/1/ND 47/31/1, squamous/adenocarcinoma/undifferentiated 53/25/1; esophagus/cardia 74/5; median daily caloric intake 1,720 Kcal (550-3160). 74 pts were treated by CRT (5 pts experienced anaphylaxis during the first cetuximab infusion). ORR (ITT) was achieved in 61 pts (77.2%), 6 pts (7.6%) had stable disease, and 9 pts (11.4%) had disease progression (3 pts were not evaluable). Grade 3-4 toxicities induction therapy/CRT were (%): neutropenia: 7.6/28.4; febrile neutropenia: 0.0/2.7; vomiting: 1.3/4.0; mucositis: 1.3/5.4; diarrhea: 3.8/2.7; dysphagia-esophagitis: 1.3/13.5; rash: 7.6/10.8; allergy 8.9/0.0. One toxic death (1.3%) occurred after CRT related to esophagitis with GI bleeding. Conclusions: Threshold for efficacy was reached with an ORR of 77.2%. Chemoradiotherapy with FOLFOX plus cetuximab is active and has an acceptable toxicity profile in patients with locally advanced cardia or esophageal cancer. No significant financial relationships to disclose.