Fig. 2

Immunohistochemical staining results of a patient with accessory breast cancer. A Photomicrograph showed poorly differentiated adenocarcinoma (hematoxilin-eosin stain × 20). B GCDFP-15 was positive. C GATA-3 was positive. D CK7 was positive. E CK20 was negative. F FISH showed no HER2 amplification