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Qiao's Pathology: Molecular Subtype of Breast Carcinoma: Basal-like

Microscopic photo showing a high grade invasive breast carcinoma. The tumor cells are negative for ER (estrogen receptor), PR (progesterone receptor), HER2/neu, and CK 5/6 (cytokeratin 5/6). However, the tumor cells are strongly positive for EGFR (epidermal growth factor receptor) (see insert). Jian-Hua Qiao, MD, FCAP, Los Angeles, CA, USA.

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Uploaded on April 23, 2013
Taken on April 23, 2013