subpleural pulmonary nodulenoncalcified subpleural nodule in lungsubpleural nodulenoncalcified nodulesnon calcified lung nodulenoncalcified lung nodule mayo clinicmultiple subpleural nodulessubpleural nodular density lung4 mm subpleural nodule lung3 mm noncalcified pulmonary nodulesubpleural nodule left lower lobesubpleural nodule right middle lobe