A phase I dose escalation study of S-1 with concurrent radiotherapy in elderly patients with esophageal cancer.

Abstract:

BACKGROUND:Concurrent chemoradiotherapy (CRT) with 5-fluorouracil (5-FU) and cisplatin (CDDP) are often associated with significant incidence of toxic effects in elderly patients with esophageal cancer. This phase I trial was designed to determine the maximum tolerated dose (MTD) and dose-limiting toxicity (DLT) of S-1, an oral 5-FU derivative, when given with radiotherapy in elderly patients. METHODS:Patients who were age of 70 years or older with histologically confirmed esophageal cancer, and had an Eastern Cooperative Oncology Group (ECOG) score of 0-2 were eligible for this study. Radiotherapy was administered in 1.8 Gy fractions 5 times weekly to a total dose of 54 Gy. S-1 was administered on days 1-14 and 29-42 at the following dosages: 60, 70, and 80 mg/m(2)/day. TRIAL REGISTRATION:NCT01175447 (ClinicalTrials.gov). RESULTS:Twelve previously untreated patients were enrolled in this study. No grade 3 or 4 toxicity was observed in six patients treated at the 60 and 70 mg/m(2) dose levels. DLT was observed in four of six patients treated at the 80 mg/m(2) dose level. Two patients developed grade 3 esophagitis, one patient developed grade 3 esophagitis and pneumonitis, and one patient developed grade 3 thrombocytopaenia. Endoscopic complete response (CR) was observed in eight patients (66.7%). The median progression free survival (PFS) was 20 months and median overall survival was 29 months. CONCLUSIONS:The MTD of S-1 was 80 mg/m(2), and the recommended dose (RD) for phase II studies was 70 mg/m(2). This regimen was well tolerated and active in elderly patients with esophageal cancer, meriting further investigation in phase II studies.

journal_name

J Thorac Dis

authors

Ji Y,Qiu G,Sheng L,Sun X,Zheng Y,Chen M,Du X

doi

10.21037/jtd.2016.02.70

subject

Has Abstract

pub_date

2016-03-01 00:00:00

pages

451-8

issue

3

eissn

2072-1439

issn

2077-6624

pii

jtd-08-03-451

journal_volume

8

pub_type

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