case_images: PMC11102661_01
case_images: Computed tomography chest without contrast showing 15 mm nodular asymmetric soft tissue density in the left breast upper inner quadrant.
case_images: 10.1177_23247096241246627-fig1.jpg
case_images: PMC11102661_01_10.1177_23247096241246627-fig1.jpg
case_images: fig1-23247096241246627
case_images: Evaluation, including a chest computed tomography scan, revealed a mass in the left breast (Figure 1).
case_images: Targeted ultrasound of the mass in the inner left breast was performed and demonstrates a 14 x 10 x 9 mm irregular hypoechoic mass with vascular flow at 11:00 axis 2 cm from the nipple.
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case_images: PMC11102661_01_10.1177_23247096241246627-fig2.jpg
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case_images: Subsequent breast-specific imaging resulted in multiple left breast core biopsies (Figure 2).
case_images: Whole image of high magnification of biphasic nests displaying a dual population of smaller, darker blue cells with scant cytoplasm toward the periphery of the nests and larger, paler cells with slightly more abundant eosinophilic cytoplasm within the center.
case_images: 10.1177_23247096241246627-fig3.jpg
case_images: PMC11102661_01_10.1177_23247096241246627-fig3.jpg
case_images: fig3-23247096241246627
case_images: Histological sections demonstrated a biphasic neoplasm composed of densely packed, cytologically bland basaloid tumor islands surrounded by compact, eosinophilic basement membrane-like material, arranged in a "jigsaw" pattern (Figure 3). Although relatively circumscribed, some peripheral infiltration into adjacent tissue was present (Figure 3).