ABSTRACT
107 A 13-year-old domestic shorthair cat presents with a 2-month history of coughing. Lung sounds are decreased ventrally. Thoracic radiographs show a large volume thoracic effusion (Figure 107.1). The fluid has the following characteristics: total protein 53 g/L (5.3 g/dL), total nucleated cell count 2540/µL, the fluid is yellow-orange in color and mildly cloudy. Cytologic examination shows ~50% non-degenerate neutrophils, 25% small lymphocyctes, and 25% large mononuclear cells identified as macrophages. In addition, a small population of cells is observed that show characteristics of malignancy. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429401725/9d69b4ae-80d1-4f44-9dcb-659cda134065/content/fig107_1_C.jpg"/>
i. Based solely on the cell count and total protein content, how would you describe this effusion?
ii. Which neoplastic diseases are on your differential diagnosis list?
