ADA and Pleural effusion: Routine examination of pleural effusion: Rivalta test is positive, total white blood cell count is 2725×106/L, monocytes account for 95%; Pleural effusion biochemistry: lactate dehydrogenase 128 IU/L, adenosine deaminase 10.1 U/L, protein quantification 32.9 g/L, glucose quantification 8.21 mmol/L, chloride 106 mmol/L.