choanal atresia choanal atresia, bilateral https://www.malacards.org/card/choanal_atresia_bilateral icd11.foundation:1138913171 GARD:0019890 Bilateral choanal atresia is a congenital anomaly that is usually sporadic (but some familial cases have been reported), is more commonly seen in females than in males (2:1), and where the nose is blocked on both sides by bony or soft tissue formed during embryological development. It is characterized by respiratory distress relieved by crying and rhinorrhea that presents at birth. MEDGEN:870857 UMLS:C4025317 Orphanet:137920 MONDO:0015313