Fig. 1

Imageological and pathological examination. Enhanced magnetic resonance imaging revealed an irregular mass in the left breast (A). Diffuse solid sheet-like tumor nests, focal acinic component, and abundant lymphocytes were observed in preoperative core needle biopsy (B, H&E 40×; C H&E, 100×). Gross examination revealed a solid nodule (D). (H&E, hematoxylin and eosin.)