pleural thickening lung cancernodular pleural thickening lungthickening of lung liningright pleural thickeningpleural parenchymal thickeningbiapical pleural thickeningchronic pleural thickeningthickening of lung wallspleural thickening asbestosresidual pleural thickeningcalcified pleural thickeningbilateral pleural thickening