lower respiratory tract disease lung disease A lower respiratory tract disease in which the function of the lungs is adversely affected by narrowing or blockage of the airways resulting in poor air flow, a loss of elasticity in the lungs that produces a decrease in the total volume of air that the lungs are able to hold, and clotting, scarring, or inflammation of the blood vessels that affect the ability of the lungs to take up oxygen and to release carbon dioxide. NCI:C3198 DOID:29 disease_ontology DOID:766 SNOMEDCT_US_2018_03_01:19829001 ICD10CM:J98.4 Updating out dated CUI and removing lung abscess as a synonym. DOID:850 UMLS_CUI:C0024115 DOID:11894 DOID:11895 MESH:D008171