有大一女生确诊乳腺癌，专家呼吁筛查年龄前移

Core Viewpoint - The article highlights the increasing incidence of breast cancer among younger women in China and emphasizes the need for improved early screening methods to enhance early detection rates and survival outcomes [3][5][6]. Group 1: Breast Cancer Statistics and Trends - Breast cancer is the most common malignant tumor among women globally, with new cases surpassing lung cancer in 2020, making it the leading cancer worldwide [4][5]. - In China, the standardized five-year relative survival rate for breast cancer has exceeded 60% from 2019 to 2021, but over 20% of patients are still diagnosed at advanced stages (III-IV) [5][6]. - The incidence of breast cancer is rising among women aged 30 and below, as well as those aged 35 to 45 [5]. Group 2: Screening and Diagnosis - Current screening methods include breast examinations, ultrasound, and mammography, which have achieved high detection rates, particularly in underdeveloped regions [6][7]. - Despite advancements, screening precision remains a challenge, with a need for increased awareness among younger women and those in perimenopause [7][8]. - AI technology is being integrated into screening processes to enhance diagnostic accuracy and efficiency [8][9]. Group 3: Genetic Factors and Personalized Screening - Breast cancer has a strong genetic component, with mutations in BRCA1 and BRCA2 genes significantly increasing risk [9]. - High-risk individuals should begin screening at age 20, utilizing a combination of ultrasound, MRI, and genetic testing for personalized risk assessment [9]. - Early detection can lead to a five-year survival rate of nearly 90%, while late-stage detection results in a survival rate of less than 30% [9].