Patients with colorectal cancer that had metastatic lesions after been treated with
definitive surgery or chemoradiotherapy are being asked to participate in this study.
1. To observe immunity-mediated tumor response outside the radiation field (abscopal
effect) after chemoradiotherapy of a metastatic site in metastatic colorectal cancer
patients.
2. To induce the efficacy (effectiveness) of a new combination of therapy,
chemoradiotherapy and thymalfasin for heavily pretreated, metastatic esophageal cancer
patients;
3. To explore the role of PET/CT scanning to assess tumor response/abscopal effect.
This study will help find out what abscopal effects (good or bad) the combination of
radiotherapy and thymalfasin has on metastatic esophageal cancer.