Steroid hormone receptors in breast tumours presenting during pregnancy or lactation.


Cytosol oestrogen receptor (ER) and progesterone receptor (PR) levels were measured in tumours from three patients with breast cancer during pregnancy and from three patients developing breast cancer while lactating. All lactating patients were ER-positive and two were PR-positive, whereas pregnant patients were uniformly ER-negative and PR-negative… (More)


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