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Concurrent chemoradiotherapy (CCRT) is an effective first-line treatment for esophageal squamous cell carcinoma (ESCC). The present study aimed to compare clinical outcomes between three nedaplatin-based regimens for CCRT of ESCC. Patients with stage II-III thoracic ESCC in China between January 2012 and May 2016 were included. Patients received esophageal ultrasonography prior to treatment. Chemotherapy was as follows: i) 100 mg/m 2 nedaplatin intravenously on day 1 and 70 mg/m 2 tegafur-gimeracil-oteracil potassium (S-1) orally twice daily for 2 weeks; ii) 50 mg/m 2 nedaplatin intravenously on days 1 and 2 and 35 mg/m 2 docetaxel intravenously on days 1 and 8; or iii) 60 mg/m 2 nedaplatin intravenously on days 1 and 2. Intensity-modulated radiotherapy was used to administer a total dose of 60-66 Gy (1.8-2.0 Gy per fraction) to the primary tumor and 45-50 Gy to the subclinical region. A total of 70 patients were enrolled (median age, 66 years; range, 50-81 years). T4 disease was identified in 45 (64.3%) patients. All patients completed radiotherapy and received ≥2 chemotherapy cycles. Estimated 1-, 2- and 3-year overall survival (OS) rates were 82.9, 53.9 and 31.4%, respectively. OS and progression-free survival were similar between the three treatment groups. Grade 3/4 hematological toxicities were observed in 35 (50%) patients. The incidence of serious treatment-associated toxicities was numerically highest for the nedaplatin/docetaxel combination. Patients with thoracic ESCC had good clinical outcomes following CCRT. With similar survival rates and disease responses yet lower hematological toxicities, nedaplatin/S-1 and single-agent nedaplatin may be preferable to nedaplatin/docetaxel. Poor control of distant metastasis may be a disadvantage of single-agent chemotherapy use in CCRT, and a further study with larger cohorts is required to confirm this.

oncology letters

Nedaplatin‑based chemotherapy regimens combined with concurrent radiotherapy as first‑line treatment for stage II‑III esophageal squamous cell carcinoma