Fig. 4

Microscopic findings on core needle biopsy. a Core needle biopsy suggests invasive ductal carcinoma (HE stain). b–d Tumor cells do not express estrogen receptor (ER) (b), progesterone receptor (PgR) (c), or HER2/neu protein (d)
Microscopic findings on core needle biopsy. a Core needle biopsy suggests invasive ductal carcinoma (HE stain). b–d Tumor cells do not express estrogen receptor (ER) (b), progesterone receptor (PgR) (c), or HER2/neu protein (d)