Smear shows a moderate number of small lymphocytes and neutrophils admixed with many variable sized sheets and clusters of hyperplastic mesothelial cells, some exhibiting moderate atypia. Other scattered small and large clusters and separate formed of cells showing irregular hyperchromatic nuclei and vacuolated cytoplasm are also seen. Such cytological features may produce by atypical mesothelial cells hyperplasia, epithelioid mesothelioma or metastatic adenocarcinoma.
Chest pain and pleural effusion
Three smears were submitted and stained.
Pleural fluid, cytology:
COMMENT: