PMC6372000_01
(A) On mammography, a high-intensity mass-like opacity (5x4 mm in size) with relatively irregular margins was seen at the upper-outer quadrant next to the axillary tail in the right breast (marked with a circle). (B) On sonography, it was seen that the opacity on the mammography represents a heterogeneous, hypoechoic solid mass lesion (51x32x26 mm in size) with cystic appearance at inferior and malignant features (marked with a circle).
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F1
The Breast Imaging-Reporting and Data System (BI-RADS) Category 4 breast lesions were detected in 2 patients, and the BI-RADS Category 5 breast lesions were detected in 3 patients on the mammogram (Fig. 1).
(A) Tumor composed of squamous cells showing features (H&Ex10). (B) Tumor composed of squamous cells showing features (H&Ex4). (C) Positive cytokeratin 5/6 staining by immunohistochemically (Cytokeratin 5/6x10).
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F2
According to a histopathological evaluation, a matrix-producing subtype was detected in 2 patients, and squamous cell carcinoma was detected in 1 patient, while histological subtype was not reported in remaining 2 patients (Fig. 2).