Translational research
tumor
TUMOR, RECTAL CANCER
Translational research using tumor tissue and blood will be conducted to interpret the clinical outcomes, treatment response, and prognosis in association with the molecular biological characteristics of rectal cancer. A specified protocol for the collection and preparation of fresh tissue and blood at different treatment stages will be given to all participating hospitals. Participation in the translational components of this trial is optional and subject to regional capacities. Samples will be collected and used after obtaining participant consent.