Sophomore Pathology Course Pleural and Mediastinal Pathology Dr. Almagro Click on image to enlarge. 1 Pleural effusion. The fluids shown in the slide consist of one which is clear and amber-colored most likely transudative and a turbid slightly white fluid most likely exudative. 2 Pleural effusion.
Fluid is grossly bloody.
This may represent hemothorax. 3 Chylous pleural effusion. 5 Pleural fluid cytology showing hematoxylin-eosin stained section of the cell block with a similar cluster of malignant cells as that in Slide 4. Mucin stain of the malignant cells in the pleural fluid showing a few positive cells indicating a metastatic adenocarcinoma to the pleura rather than a primary malignant tumor of the pleura, i.e., malignant mesothelioma. 7 Malignant pleural mesothelioma.