Keywords Breast cancer China delay quality of life young women 1 Introduction Breast cancer is the most common cancer in women and severely threatens women's health, with 2.3 million new patients with breast cancer diagnosed worldwide in 2022.1 China accounts for over 15% of the global breast cancer burden, with 357,000 cases and 75,000 deaths annually.2, 3 Notably, the incidence of breast cancer in women aged < 40 years old has risen substantially in recent years.
