Left cardiac border bulge can be seen in all, except -
Azygous vein is a Right sided structureand all others are left sided.It lies in thr angle between the right main bronchus and trachea and size is<10mm diameter on erect X-ray.
Enlarged azygous vein
Left appendicular overgrowth
Coronary aery aneurysm
Pericardial defect
Cardiovascular system