case_images: PMC11774839_01
case_images: (A) Color Doppler ultrasound of the breast shows a 17.4 x 12.9 mm mass at the 9 o'clock position of the right breast, with a clear border and irregular shape. (B,C) Mammograms of the patient (red arrows representative lesion).
case_images: fmed-11-1525050-g001.jpg
case_images: PMC11774839_01_fmed-11-1525050-g001.jpg
case_images: fig1
case_images: During a routine medical check-up at our hospital, a Doppler ultrasound revealed a 17.4 x 12.9 mm mass in the outer quadrant of the right breast (Figure 1A), which was classified as BI-RADS category 3. Mammography (Figures 1B,C) showed a 2.0 cm x 1.3 cm well-defined mass with clear margins in the right breast, also classified as BI-RADS category 3.
case_images: (A) Tumor nests with mildly heterogeneous cells; nucleoli 1-8 per HPF (HE x100) (B) General view of postoperative specimens. (C) Fusiform and epithelioid hyaline myoepithelial cells, and cuboidal or columnar glandular epithelial cells forming tubular or papillary structures (HE x 40).
case_images: fmed-11-1525050-g002.jpg
case_images: PMC11774839_01_fmed-11-1525050-g002.jpg
case_images: fig2
case_images: Postoperative paraffin pathology (Figure 2A) revealed low-grade malignant adenomyoepithelioma, characterized by a nested mass with peripheral pushing and infiltrative growth. Postoperative paraffin pathology (Figures 2B,C) revealed a small residual area of low-grade malignant adenomyoepithelioma in the excised breast specimen, identified through serial sections and immunohistochemistry.