17. Mesothelial cells
Flat ephitelium
Large cells
Central and round
nucleus
More peripheral in
activated cells
Binucleated
Prominent nucleolus
Basophilic cytoplasm
Pinkish cytoplasmic
expansion
31. Neoplastic effusion
False positive – non neoplastic
mesothelial reactivity
False negative – no exfoliation
Distinction between
Mesothelioma and Carcinoma