A Multicenter Prospective Observational Cohort Based on a Breast Cancer Medical Record Database in China

1. To construct a prospective, multi-center breast cancer treatment cohort in China, and analyze the factors affecting breast cancer diagnosis and treatment. 2. To evaluate the diagnosis and treatment and prognosis of breast cancer among patients in different regions and hospitals.

This research aims to: A. Understand and analyze the current status of breast cancer diagnosis and treatment; B. Publish an annual report on diagnosis and treatment; C. Data sharing, dynamic evaluation; D. Evaluate consensus and guideline promotion and implementation effects; E. Propose and set clinical quality standards for industry associations, and propose improvement goals; F. Provide a basis for industry associations to formulate specialized training programs; G. To provide assistance in the formulation of health insurance policies; H. Provide a platform for clinical research on breast cancer; I. Provide evidence for the formulation of clinical guidelines and consensus