Breast Cancer Screening

Overview of Breast Cancer Screening

Breast cancer screening involves the systematic use of medical tests to detect breast cancer in individuals before any symptoms become apparent [3, 5]. This proactive approach is critical given that breast cancer is the most frequently diagnosed cancer among women, accounting for approximately 30% of all new cancer cases, with its incidence steadily increasing [2]. It represents a leading cause of cancer mortality for women in the United States [3].

The primary method for breast cancer screening is mammography [2, 3, 6]. Over the past three decades, the widespread implementation of mammographic screening programs has contributed to a significant reduction in breast cancer mortality, estimated at least 20% [2]. While digital mammography (DM) has been a standard, newer technologies such as digital breast tomosynthesis (DBT) combined with synthesized two-dimensional mammography (s2D) are increasingly recognized for their association with higher cancer detection rates and lower recall rates compared to DM alone [4]. For women with dense breasts, ultrasound (US) may serve as an adjunct to mammography, and magnetic resonance imaging (MRI) may be indicated for those at intermediate or high risk [6].

Screening guidelines vary internationally and continue to evolve, with organizations like the European Commission Initiative on Breast Cancer (ECIBC) and the US Preventive Services Task Force regularly reviewing evidence to inform recommendations [1, 3, 5, 7]. While many guidelines recommend screening for average-risk women starting at age 50, some suggest beginning at age 40 [6, 10]. The optimal screening ages, intervals (e.g., annual, biennial, triennial), and specific modalities for population-wide screening remain areas of ongoing research and debate [3, 8]. Recognized limitations of current approaches include the potential for underdiagnosis, false positive results, and overdiagnosis [2]. Despite these complexities, breast cancer screening remains a cornerstone of women's health, aiming to identify cancers early when they are most treatable, thereby improving outcomes and reducing the overall burden of the disease [10].