In this study, medical records and follow-up information of young breast cancer patients (age ≤35 years at first diagnosis) who were first diagnosed and treated in the years (2000, 2003, 2006, 2009, 2012 and 2015) were collected from multiple hospitals in China from 2000 to 2015, to establish a retrospective cohort of young breast cancer patients. Clinical characteristics, diagnosis and treatment, and survival rates of young breast cancer patients from 2000 to 2015 were analyzed. To explore the main factors affecting the clinical diagnosis and treatment and the survival of patients.
To describe the clinical characteristics, the diagnosis and treatment, the survival status and change trend of young breast cancer patients in China from 2000 to 2015, and to explore and discuss the main influencing factors.