Long-term survival outcome of E1201: An Eastern Cooperative Oncology Group (ECOG) randomized phase II trial of neoadjuvant preoperative paclitaxel/cisplatin/radiotherapy (RT) or irinotecan/cisplatin/RT in endoscopy with ultrasound (EUS) staged esophageal adenocarcinoma.
69 Background: E1201 included operable esophageal adenocarcinoma, staged II-IVa by EUS and accrual ended Oct 2004. The primary endpoint was pathologic complete response (pCR), a surrogate endpoint generally associated with survival which did not meet criteria for further study of either arm. Long term survival results are now available. Stratification included clinical/EUS stage and ECOG performance status (PS). Methods: 81 eligible patients (pts) began treatment. Arm A was cisplatin (C) 30mg/m2 and irinotecan (I) 50 mg/m2 on days (d) 1, 8, 22, 29 of 45 Gy RT/5 weeks. Post-op therapy was C 30 mg/m2 and I 65 mg/m2 d 1, 8 q21 days x 3. Arm B therapy was C 30 mg/m2 and paclitaxel (P) 50 mg/m2 1 hour infusion d 1, 8, 15, 22, 29 with RT. Postoperative therapy was C 75 mg/m2 and P 175 mg/m2 day 1 q21 days x 3. Results: In Arm A, 26/39 have died. Median survival (S) is 35 m (months) and the 5, 6, and 7 year S was 46%, 39%, and 35%. In Arm B, 31/42 pts have died (one pt refused follow-up). Median S in arm B is 21 m. The 5, 6, and 7 year S was 27%, 27%, and 23%. Survival by EUS stage strata: For strata 1 (Stages T2N0M0 or T3N0M0), 14/20 have died. Median S is 37 m and 5 year S is 44%. In stage stratum 2 (Stages T1-3N1M0 or T1-3N0-1M1a), 43/61 have died. Median S is 24 m and 5 year S is 34%. For PS Strata: Patients with PS 0, had median S 35 m and 5 year S of 37% whereas for those with PS 1, the outcomes were 20m and 35%. Survival differences for the treatments and for these strata were not statistically significant. Conclusions: Long term survival is similar for both treatment arms and does not appear superior to results achieved with 5FU based regimens. The prognostic importance of the pretreatment strata was not confirmed. These data, along with the reported pCR (15% arm A; 17% arm B) and toxicity data (> =grade 3 during chemo/RT 68% arm A; 65% arm B), may have importance in aiding in the design and interpretation of ongoing and planned phase II trials adding novel agents or treatment approaches to backbones built on variations of these two regimens.