Preoperative Therapy with Concurrent Paclitaxel/Carboplatin/Infusional 5-FU and Radiation Therapy in Locoregional Esophageal Cancer

Abstract

This phase II study was designed to determine the feasibility, toxicity, and therapeutic efficacy of a novel outpatient combined-modality preoperative regimen in patients with localized esophageal cancer. One hundred twenty-nine eligible patients with previously untreated, potentially resectable, clinical stage I–III carcinoma of the esophagus were treated between July 1995 and July 1999. Combined-modality treatment included: paclitaxel, 200 mg/m2, 1-hour i.v. infusion, days 1 and 22; carboplatin, an area under the concentration time curve 6.0 i.v., days 1 and 22; 5-fluorouracil, 225 mg/m2/day, continuous i.v. infusion, days 1–42; and radiation therapy, 45 Gy, 1.8-Gy single daily fractions 5 days weekly, beginning day 1. All patients underwent surgical resection 4–8 weeks after completion of the preoperative therapy. One hundred twenty-three patients (95%) completed preoperative therapy, 105 patients (81%) underwent attempted resection, and 96 patients (74%) had definitive resection. A pathological complete response was achieved in 47 of 123 evaluable patients (38%); an additional 30 patients (24%) had only microscopic residual tumor. With a median follow-up of 45 months, the median survival is 22 months (95% CI = 15–32 months), with actuarial 1-, 2-, and 3-year survivals of 71%, 47%, and 41%, respectively. The most frequent grade 3/4 toxicities of the neoadjuvant program were leukopenia (73%) and esophagitis (43%). Although 73 patients (57%) required brief hospitalizations during preoperative therapy, there were no treatment-related deaths, and 94% of patients remained candidates for resection after the completion of treatment. Six patients (6%) died after surgery. This novel combined-modality regimen is highly active in the treatment of locoregional esophageal cancer, producing an actuarial 3-year survival of 41%. Although this preoperative regimen produced moderate acute toxicity, there were no treatment-related deaths and the large majority of patients were able to undergo subsequent esophageal resection. These results, obtained in a community-based setting and involving multiple surgeons, radiation oncologists, and medical oncologists, compare favorably with those of previous single-center and multicenter results. Further evaluation of novel combined-modality programs is warranted, as is the incorporation of epidermal growth factor receptor antagonists or other targeted agents.