<unk>  is a congenital disorder where the back of the nasal passage <unk>  is blocked, usually by abnormal bony or soft tissue (membranous) due to failed hole development of the nasal fossae during prenatal development. It causes persistent rhinorrhea, and with bilateral<unk>  and obstructed airway that can cause cyanosis and hypoxia.<unk>  is diagnosed based on the inability to place a nasal catheter, and radiology results (particularly CT scans). Treatment involves maintaining an open airway, and may involve surgery to reopen the airway, potentially with a stent.<unk>  is a fairly rare condition, affecting between 1 in 7,000 to 1 in 5,000 live births.
Choanal atresia
Hypospadias
Duodenal atresia
Intestinal atresia
Gastric atresia
Cloacal exstrophy
Gastroschisis
Diaschisis