[Immunohistochemical evaluation of estrogen and progesterone receptors on paraffin sections of breast carcinomas. Practical thoughts based on the study of 368 cases].

368 formalin-fixed and paraffin-embedded carcinomas of the breast were studied by immunohistochemistry using antibodies to estrogen and progesterone receptors. The results, which are comparable to the results published in the literature, are discussed with particular emphasis on quality assurance parameters.