Table 3 Change in estrogen receptor and progesterone receptor (ER/PR) and human epidermal growth factor receptor 2 (HER2) status in primary and metastatic tumors
From: The importance of biopsy in clinically diagnosed metastatic lesions in patients with breast cancer
Primary tumor | Metastatic lesions | Case number |
|---|---|---|
ER - | ER + | 2 |
ER + | ER - | 5 |
PR - | PR + | 1 |
PR + | PR - | 7 |
HER2 - | HER2 + | 2 |
HER2 + | HER2 - | 2 |