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Licensed asbestos abatement contractor. Sarcomatoid mesothelioma is now more of a challenge than epithelioid or biphasic mesothlioma. The distinction of benign from malignant mesothelial proliferations in cytologic specimens can be problematic. Proteins such as cytokeratin 56 calretinin wt 1 and podoplanin help pathologists differentiate mesothelioma from other cancers such as lung cancer.
Malignant mesothelioma mm is a highly lethal disease arising from mesothelial cells of the pleural peritoneal and pericardial cavities. Immunohistochemical tumor markers are proteins that help doctors tell the difference between different types of cancer. Markers that have a high sensitivity for epithlioid mesotherlioma tend to have far lower sensitivity in sarcomatoid mesothelioma.
Detection of tissue cea like substance as an aid in the differential diagnosis of malignant mesothelioma pathology 143. The best discriminators among the antibodies considered to be negative markers for mesothelioma are cea moc 31 ber ep4 bg 8 and b723. Diagnosis of sarcomatoid mesothelioma is largely one of exclusion 9.
Antimesothelial marker expression correlates with histological pattern aims. Malignant mesothelioma mm is an uncommon neoplasm arising from the serosal surfaces of the pleura peritoneum pericardium tunica vaginalis and other body cavities12 the tumor cells can exhibit epithelial sarcomatous andor biphasic differentiation. The histological findings of mesothelioma could facilitate its diagnosis and provide important prognostic information.
A panel of four markers two positive and two negative selected based upon availability and which ones yield good staining results in a given laboratory is recommended. 17 whitaker d g. Logistic regression analysis cluster analysis and cox regression analysis were performed.
Malignant epithelioid mesothelioma shows marked cytoarchitectural diversity. Epithelial mm is composed of epithelial cells arranged in tubules papillary patterns and many other histologic patterns that closely. The immunohistochemical approach should lie on the application of a panel including positive mesothelial related and negative markers which should be selected on the basis of morphology and clinical information.
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