Chylothorax is an accumulation of lymph containing chy-lomicra in the pleural cavity; it may be a life-threatening condition. Idiopathic chylothoiax in cats has proved quite resistant to treatment. A Himalayan cat, 10 months, had been anorectic and tachypneic for 3 days and was found to have bilateral pleural effusion, Centesis of both sides yielded 120 mL of opaque white fluid. Subcutaneous emphysema was present over the thoracic cavity. The heart sounds were muffled, and lung sounds were absent over the cranioventral part of the chest, Chylomicra were identified in the pleural fluid, which contained 250 mg of triglyceride per dL and 101 mg of cholesterol per dL.
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