Frequent post-operative monitoring of colorectal cancer using individualized ctDNA validated by multi-regional molecular profiling

Primary outcome(s): ctDNA dynamics and clinical relapse by conventional surveillance modalities are compared if ctDNA provides useful information on the early detection of relapse.

主要结局指标：若循环肿瘤DNA（circulating tumor DNA，ctDNA）可为复发的早期检测提供有效参考信息，则对比ctDNA动态变化与通过常规监测手段检出的临床复发情况。