lung disorder interstitial lung disease SCTID:233703007 ILD MedDRA:10022611 MESH:D017563 EFO:0004244 interstitial lung disease MEDGEN:1788738 ICD10CM:J80-J84 Orphanet:182095 NCIT:C164315 UMLS:C5441745 A diverse group of lung diseases that affect the lung parenchyma. They are characterized by an initial inflammation of pulmonary alveoli that extends to the interstitium and beyond leading to diffuse pulmonary fibrosis. Interstitial lung diseases are classified by their etiology (known or unknown causes), and radiological-pathological features. DOID:3082