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Cell Vis. 1998 Jan-Feb;5(1):24-7.

Evaluation of membranous staining of mesothelioma.

Author information

1
University of South Alabama Medical Center, Department of Pathology, Mobile, USA. jking@usamail.usouthal.edu

Abstract

Panels of immunohistochemical markers are often used to aid in categorizing malignant neoplasms involving the pleura. While epithelial membrane antigen (EMA) and human milk fat globule-2 (HMFG-2) are each reported to stain the majority of cases of adenocarcinoma and mesothelioma, authors have reported that the pattern of staining for these two antibodies can be a useful discriminant. Both are described as revealing a membranous pattern of staining for mesothelioma and a cytoplasmic staining pattern in adenocarcinoma. Immunostains were performed on 23 cases of malignant mesothelioma and 22 cases of adenocarcinoma. For EMA, 78% of mesotheliomas and 86% of adenocarcinomas stained positively, and 65% of mesotheliomas vs. 14% of adenocarcinomas exhibited a membranous staining pattern. For HMFG-2, 9% of mesotheliomas and 50% of adenocarcinomas stained positively, and 4% of mesotheliomas vs. 9% of adenocarcinomas exhibited a membranous staining pattern. Membranous staining for HMFG-2 was not a useful criterion. In this series, a membranous pattern of staining for EMA had a sensitivity of 65% and a specificity of 86% for the identification of malignant mesothelioma.

PMID:
9660721
[Indexed for MEDLINE]

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