Left cardiac border bulge can be sen in all, except
A i.e. Enlarged Azygous Vein Azygous vein is a right sided structureQ and all others are left sided. Azygous vein lies in the angle between the right main bronchus & trachea and size is < 10mm diameter on erect X-ray. Its size decreases on valsalva, in spiration; and increases in supine position, pregnancy, poal hypeension, IVC & SVC obstruction, right hea failure, constrictive pericarditis and enlarged subcranial nodes. So Azygous vein can't give rise to left cardiac bulge.
Enlarged azygous vein
Left appendicular overgrowth
Coronary aery aneurysm
Pericardial defect