Fraction Dose Escalation of Split-course Hypofractionated Concurrent Chemoradiotherapy Following Induction Chemo-immunotherapy in Unresectable Locally Advanced Esophageal Squamous Carcinoma: a Phase I Study.

Fraction Dose Escalation of Split-course Hypofractionated Concurrent Chemoradiotherapy Following Induction Chemo-immunotherapy in Unresectable Locally Advanced Esophageal Squamous Carcinoma: a Phase I Study.

This Phase I study is to determine the maximum tolerated fraction dose (MTD) for split-course hypo-CCRT following induction chemo-immunotherapy in LA-ESCC patients, to clarify the dosimetric advantage of split-course hypo-CCRT, and to investigate the treatment-related toxicities and quality of life of the new regimen.

This Phase I study is to determine the maximum tolerated fraction dose (MTD) for split-course hypo-CCRT following induction chemo-immunotherapy in LA-ESCC patients, to clarify the dosimetric advantage of split-course hypo-CCRT, and to investigate the treatment-related toxicities and quality of life of the new regimen.

Inclusion Criteria:

• histologically confirmed ESCC
• II-IVB stages (IVB stage only with metastatic celiac or supraclavicular lymph nodes) based on the TNM staging system proposed by the International Union Against Cancer (UICC 2002)
• Eastern Cooperative Oncology Group (ECOG) performance status score 0-1
• Charlson Comorbidity Index score≤4
• oral medication can be administered despite esophageal obstruction
• adequate hematological, renal and hepatic functions

Exclusion Criteria:

• contraindication for radiotherapy or chemotherapy
• prior malignancies, except for curable non-melanoma skin cancer or cervical carcinoma in situ
• distant metastasis, except for celiac or supraclavicular lymph nodes metastases