<prompt> Pleural effusion in rheumatoid arthritis is typically associated with the following features except-Glucose 60 mgdlProtein 3 gmdlPleural fluid protien to serum protein ratio of 0-5Pleural fluid LDH to serum LDH ratio of 0-6  <response>: Ans. is a i.e., Glucose 620 mgdl o When glucose in pleural fluid is less than 60mgdl it is low glucose pleural fluid.Causes of Low glucose pleural fluido Malignancyo Rheumatoid arthritis o Empyemao Hemothoraxo Paragonimiasiso Churg strauss syndromeo Lupus pleuritis occasionally 