Thinned, deficient, or excessively arched ala nasi. The phenotype is Human Phenotype Ontology entry HP_0000430 (Underdeveloped nasal alae). Also known as: Ala nasi, underdeveloped, Alar cartilage hypoplasia, Decreased size of nasal alae, Hypoplastic alae nasae, Hypoplastic alae nasi, Hypoplastic alar cartilage, Hypoplastic alar nasae, Hypoplastic nares.