nasal cavity disorder choanal atresia https://www.malacards.org/card/choanal_atresia_posterior PCA MESH:D002754 OMIM:608911 UMLS:C0008297 MONDO:0012155 GARD:0016951 DOID:9574 SCTID:204508009 atresia of nares ICD10CM:Q30.0 Choanal atresia (CA) is a congenital anomaly of the posterior nasal airway characterized by the obstruction of one (unilateral) or both (bilateral) choanal aperture(s), with clinical manifestations ranging from acute respiratory distress to chronic nasal obstruction. choanal atresia, POSTERIOR ICD9:748.0 MedDRA:10008587 MEDGEN:3395 icd11.foundation:2099486655 Orphanet:137914 hereditary otorhinolaryngologic disease