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CASE 4
A 73-year-old non-smoker man with no history of malignancy presented with pleural effusion. Pleural fluid was submitted for cytological evaluation. 
The most likely diagnosis of the case?

http://image.upmc.edu:8080/IAC-Virtual-Slide-Cases/Case-4-IAC-VS-FLUID-73M-Pleural.svs/view.apml?