Abstract
Background: Distinction between reactive mesothelial cells, malignant mesothelioma and carcinoma is challenging in both biopsy and cytologic material. This study was conducted to differentiate benign/ reactive mesothelial proliferation from malignant mesothelial proliferations and metastatic adenocarcinoma by using immunohistochemical (IHC) markers Desmin (DES), Epithelial membrane antigen (EMA) and Calretinin (CAL) in pleural uid cell block (CB) preparations. A two year descriptive study (Oct.2016- Sept.2018). 46 pleural uids samples sentMethods : to the Dept. of Pathology, RIMS for routine examination and histopathological examination by CB preparation were studied using IHC markers EMA,DES and CAL following H & E stain. Out of 46 cases, 9(19.6%) cases were diagnosed as benign, 23(50.0%) as reactive andResults: 14(30.4%) as adenocarcinoma on H & E section by CB preparations within an age range 34 to 80 years (Mean±SE, 60.32±12.13). Following IHC staining with EMA, DES & CAL, 11(23.9%) cases were conrmed as benign, 17(37.0%) as reactive, 16(34.8%) as adenocarcinoma and 2(4.3%) cases as malignant mesothelioma. This study showed that EMA, DES and CAL helpful in conrming benign or reactive mesothelialConclusions: and malignant mesothelial with epithelial cells which will be helpful in providing appropriate diagnosis in difcult cases and provide better patient management.
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