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Claudin 4 Mesothelioma
Claudin 4 Mesothelioma
➡️ http://MesotheliomaUSA.net
Claudin-4 immunohistochemistry is highly effective in distinguishing adenocarcinoma from malignant mesothelioma in effusion cytology.
Background: Adenocarcinoma can be challenging to distinguish from malignant mesothelioma in effusions, and this distinction often requires ancillary studies and clinical correlation. Immunohistochemistry for claudin-4, a tight-junction-associated protein, has recently been shown to distinguish adenocarcinoma from malignant mesothelioma, mostly in surgical specimens. Our aim was to validate and assess the immunoreactivity profile of claudin-4 in a large series of malignant effusions.
Methods: We evaluated 159 malignant effusions (84 adenocarcinomas and 75 malignant mesotheliomas). Claudin-4 immunohistochemistry was performed on cell-block paraffin sections and scored for staining intensity, staining pattern (cytoplasmic versus membranous), and percentage of positive tumor cells. Appropriate positive and negative controls were used throughout.
Results: All cases of mesothelioma were negative for claudin-4 (0 of 64). Eighty-three of 84 cases of adenocarcinoma were positive (99%); 1 case of serous carcinoma was negative. Most adenocarcinomas showed strong and diffuse membranous staining (71 of 84; 84%); 12 cases (14%) showed membranous staining of moderate intensity. The overall sensitivity for adenocarcinoma was 99% (83 of 84).
Conclusions: Claudin-4 immunohistochemistry effectively distinguishes adenocarcinoma from malignant mesothelioma with high sensitivity and specificity in the evaluation of malignant effusions.
Keywords: adenocarcinoma; claudin-4; cytology; effusion; mesothelioma.
Claudin 4 Mesothelioma
https://www.youtube.com/watch?v=Gclp-zQ_26s
https://www.youtube.com/channe....l/UCqL1ImVqMKM51W4WC
#claudin4mesothelioma #intrapleuralchemotherapymesothelioma #aretheredifferenttypesofmesothelioma #howdoyoucheckformesothelioma #asbestosexposuremesothelioma
🔗 https://pubmed.ncbi.nlm.nih.gov/24421209/
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