The clinical outcomes of elderly esophageal cancer patients who received definitive chemoradiotherapy

Background: Neoadjuvant chemoradiotherapy (CRT) followed by an esophagectomy is the standard treatment for locally advanced esophageal cancer, but remains a great challenge for elderly patients. Therefore, we aim to evaluate the efficacy of definitive CRT in elderly patients with esophageal cancer. Methods: From December 2007 to October 2017, 40 esophageal cancer patients aged >= 70 years receiving definitive CRT were retrospectively analyzed. All patients received cisplatin-based chemotherapy. Ten patients received standard doses of cisplatin 20 mg/m(2)and fluorouracil (5-FU) 800 mg/m(2)for 4 days, during the first and fifth weeks of radiotherapy. Eighteen patients received modified doses of cisplatin 16 to 18 mg/m(2)and 5-FU 600 to 800 mg/m(2). Twelve patients received lower doses of cisplatin 10 to 12 mg/m(2)and 5-FU 400 to 600 mg/m(2). The endpoints were overall survival (OS), tumor response rate, and treatment compliance. Results: The 3-year OS rate was 28.8% The 3-year OS rates for patients receiving standard, modified, and lower doses were 12.5%, 53.8%, and 0.0%, respectively (p= 0.05). There were 87.5% of patients completing the scheduled radiotherapy dose, along with two cycles of concurrent chemotherapy. The response rate (clinical complete response and partial response rate) was 70.0%. Multivariate analysis revealed that no statistical difference was found in the OS among three groups of chemotherapy dosage. The treatment response was the only independent prognostic factor to OS (p< 0.001). Conclusion: Definitive CRT with dose modification is a feasible, safe, and reasonable treatment for elderly esophageal cancer patients. Achieving a better compliance to CRT via an optimal dose modification of chemotherapy may provide better clinical outcomes and would be the treatment goal for elderly esophageal cancer patients.