Fig. 4
From: Breast carcinoma metastasis to the cheek: a case report
Hematoxylin–eosin staining revealing the large and small alveolar structures of tumor cells with nuclei of different sizes. A Buccal, ×400. B Breast, ×400. Immunohistochemical staining of the buccal lesion showing that the percentage of cells staining positive for estrogen receptor (ER) (C, ×400) and progesterone receptor (PgR) (D, ×400) was > 90% and 1–10%, respectively