Figure 1.

Mammography of bilateral breast glands showing uneven dense glandular tissue. A nodular high-density shadow, measuring ~21.6×14.7 mm and characterized by an unclear border, is visible in the upper outer quadrant of the right breast (left panel). The arrow indicates the mass detected in the breast. The skin and nipple shadows on both breasts appear normal. No lymph node shadows are visible in either armpit. The imaging diagnosis is nodules in the upper outer quadrant of the right breast, classified as BI-RADS 4a. The BI-RADS is a standardized system of reporting breast pathology encountered on mammography, ultrasound and magnetic resonance imaging (41). BI-RADS, Breast Imaging-Reporting and Data System; R, right.