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Pleural effusion is nothing but an enormous accumulation of the fluid. Transudativre pleural effusion is related to the leakage of fluid into pleural space. Pleural effusion is grouped into many stages namely exudative, fibrino purulent and organization type. Clinical features of pleural effusion are chest pain, drug as well as non-productive cough and dyspnea. Causes of transudative (watery fluid) pleural effusion are cirrhosis and heart failure. Causes of exudative (protein rich fluid) effusion are cancer, inflammatory disease. Diagnosis is based on Chest X ray, Computed tomography (CT) scan on the chest, ultrasound of the chest and thoracocentesis. Treatment is dependent on diuretics and other heart failure medications. A malignant effusion may also require treatment including chemotherapy and radiation therapy. Surgery is based on thoracotomy. Pleural effusion rarely happens because of the development that is related to the chronic heart failure. Heavy pleural effusions are linked to the appearance of disabling shortness of breath.