A<unk>  is a medical condition whereby the septum, the cartilaginous membrane dividing the nostrils, develops a hole or fissure.
Perforated septum
Deviated septum
Congenital absence of the pericardium
Pericardial cyst
Endocardial cushion defect
Atrioventricular canal defect
Annuloaortic ectasia
Ductus arteriosus aneurysm