[Expert consensus on the diagnosis and treatment of young breast cancer in China (2026 edition)].

In recent years, the incidence of breast cancer in young women is increasing across the world, especially in China. Younger patients face a high risk of recurrence and metastasis, along with unique needs related to fertility, psychological well-being, and return to work. Therefore, clinical management must not only aim to ensure survival outcomes but also address their long-term quality of life. More than one hundred Chinese experts from breast surgical oncology, medical oncology, radiation oncology, gynecology, reproductive medicine, genetics and nursing have gathered together to address these challenges. Based on the latest evidence from China and abroad, they have updated the "Expert consensus on the diagnosis and treatment of young breast cancer in China" from "2022 edition" to "2026 edition". This new consensus delves into the diagnosis and treatment of young breast cancer patients, offering suggestions for many clinical questions lacking standard answers. The consensus aims to standardize the diagnosis and treatment procedures, optimize treatment strategies, guide future clinical research, and ultimately improve patients' prognosis and quality of life.