Pleural effusion is seen in: 1. Pulmonary edema 2. Lymphangitic spread of carcinoma - often unilateral 3. Tuberculosis 4. Lymphangiomyomatosis (LAM) 5. Asbestosis #Diagnosis #Radiology #Pulmonary #Pleural #Effusion #PleuralEffusion #Differential #RadiologyAssistant