Prediction of endocrine response in breast cancer by immunocytochemical detection of oestrogen receptor in fine-needle aspirates.
An immunocytochemical technique has been developed to detect the oestrogen receptor (ER) in samples obtained by fine-needle aspiration of primary or secondary breast carcinoma tissue. 45 (75%) of 60 samples contained sufficient cells for analysis. 19 (90%) of 21 patients who responded to endocrine therapy had samples with ER-positive cells compared with only 7 (39%) of 18 of those who did not respond (p less than 0.001). This test, which causes little pain to the patient and does not need a surgical biopsy, is as accurate as any other method of predicting the response to endocrine treatment in breast cancer.
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001707:Biopsy, Needle; D001943:Breast Neoplasms / Q000032:analysis* / Q000473:pathology / Q000628:therapy; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008875:Middle Aged; D010052:Ovariectomy; D011336:Probability; D011446:Prospective Studies; D011960:Receptors, Estrogen / Q000032:analysis*; D013629:Tamoxifen / Q000627:therapeutic use
D011960:Receptors, Estrogen; D013629:Tamoxifen