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Oestrogen receptor status of the primary DCIS and the subsequent invasive episodes, either ipsilateral or contralateral.
| ER status within the primary DCIS that had subsequent invasive episode (n = 69, 10%) | ER status within the invasive disease (ipsilateral and/or contralateral) | ||
|---|---|---|---|
| Positive | Negative | Unknown | |
| Positive (n = 55, 12%) | 46 (92% of valid cases) | 4 (8% of valid cases) | 5 |
| Negative (n = 14, 8%) | 6 (43%) | 8 (57%) | 0 |
