Exploratory Research on Constructing a Computational Biological Model Based on NGS for MRD After Breast Cancer Surgery

This study will include 80 subjects after radical breast cancer resection. The results of CA15-3, CEA, color Doppler ultrasound and other traditional postoperative monitoring examinations for breast cancer, as well as 5ml of peripheral venous blood, were collected on the day of enrollment/the 7th day after adjuvant treatment/the 3rd, 6th, 9th, 12th, 15th, 18th, 21st, 24th, 30th and 36th months after surgery. We observe and quantify the characteristic changes of cfDNA in the blood of breast cancer subjects after surgery, and establish a computational biological model based on next generation sequencing to monitor breast cancer MRD;