Article Text

PDF

Demonstration of oestrogen receptors in paraffin wax sections of breast carcinoma using the monoclonal antibody 1D5 and microwave oven processing.
  1. P Sannino,
  2. S Shousha
  1. Department of Histopathology, Charing Cross and Westminster Medical School, Charing Cross Hospital, London.

    Abstract

    This study aimed at assessing the usefulness of a new monoclonal antibody (1D5) for the demonstration of oestrogen receptors (ER) in paraffin wax sections, using brief microwave processing rather than proteolytic predigestion. Routinely processed paraffin wax sections of 50 cases of breast carcinoma with known ER concentrations, estimated by the standard dextran-coated charcoal (DCC) biochemical assay, were examined using the avidin-biotin complex-immunoperoxidase technique. The results were assessed semiquantitatively, using a five grade scoring system. Of the 50 cases examined, 37 were positive and six were negative by both DCC and immunohistology. Of the remaining seven cases, three (6%) were negative by DCC but positive with immunohistology, and four (8%) were positive with DCC and negative with immunohistology. The DCC results of the latter four cases were 10, 14, 14 and 16 fmol/mg protein which is at the lowest level of positivity, our cutoff point being less than 10 fmol. The monoclonal antibody 1D5, as used in this study, can provide easily assessed reliable information about the ER status of breast carcinoma using routinely processed paraffin wax sections.

    Statistics from Altmetric.com

    Request permissions

    If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.