title: Monoclonal antibody 323/A3: a marker for the presence of breast carcinoma.
abstract: The monoclonal antibody 323/A3 has been suggested as a marker of cancer risk in benign breast disease. Patients who have had both a benign biopsy and a later biopsy for breast carcinoma were studied. The staining patterns in the biopsies were analysed using a semi-quantitative recording system adapted from Mariani-Costantini et al. Immunohistochemical (IHC) staining was carried out on formalin fixed paraffin embedded tissue sections. In apocrine metaplasia the cytoplasm of benign tissue did not stain with 323/A3 whereas in the biopsies with associated breast cancer 5 of 7 biopsies stained, a statistically significant difference. A positive predictive value of 100% was noted for strong cytoplasmic staining to indicate the presence of carcinoma and this phenomenon may be useful as a means of demonstrating patients who have malignant breast disease in which a biopsy has inadequately sampled the breast tissue.
authors.affiliation: Department of Surgery, University of Wales, College of Medicine, Heath Park, Cardiff, U.K.
authors.forename: S P
authors.initials: SP
authors.lastname: Courtney
authors.forename: S
authors.initials: S
authors.lastname: Williams
authors.forename: R E
authors.initials: RE
authors.lastname: Mansel
mesh_terms: D000328:Adult; D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm / Q000032:analysis*; D001941:Breast Diseases / Q000276:immunology* / Q000473:pathology; D001943:Breast Neoplasms / Q000276:immunology* / Q000473:pathology; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D008562:Membrane Glycoproteins / Q000032:analysis*; D008875:Middle Aged; D018396:Mucin-1; D011230:Precancerous Conditions / Q000276:immunology* / Q000473:pathology; D012189:Retrospective Studies
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D008562:Membrane Glycoproteins; D018396:Mucin-1