has symptom middle lobe syndrome MESH:D008878 A lung disease that is defined as a recurrent or chronic collapse of the right middle lobe, right upper lobe or lingula of the lung. It is caused by endobronchial tumour, granulomatous infections, lymphadenopathy, foreign bodies, endobronchial silicotic nodules, inspissated mucus associated with cystic fibrosis or inflammation as a result of an infection. UMLS_CUI:C0026069 SNOMEDCT_US_2025_09_01:28295001 MESH:D008878 DOID:2810 disease_ontology lung disease enlargement of lymph nodes granulomatous inflammation lymphadenopathy