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Immunohistochemical expression of oestrogen receptor in normal breast tissue
Published online by Cambridge University Press: 05 December 2011
Synopsis
The human breast undergoes profound changes during the menstrual cycle. The development of monocloiial antibodies to oestrogen-receptors (ER) allows study of receptor content and distribution in individual components of breast tissue. Forty-one specimens from premenopausal patients who underwent bilateral mastectomy for benign conditions were evaluated. The patients were categorised into early follicular, late follicular, early luteal, late luteal, and menstrual phases. An HSCORE, a semiquantitative evaluation of the intensity and distribution of receptor antigen localisation, was evaluated for the ductal and lobular epithelia as a tissue mean HSCORE. ER localised to the nuclei of the epithelium and was not observed in stromal elements. Receptor concentration was greater for ER in the follicular phase but this finding was not as striking as differences between lobules in a single breast and even between breasts. This heterogeneous expression between lobules was in contrast to the relatively uniform expression of receptor within a lobule of a given specimen.
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- Copyright © Royal Society of Edinburgh 1989