<prompt> Left cardiac border bulge can be sen in all, exceptEnlarged azygous veinLeft appendicular overgrowthCoronary aery aneurysmPericardial defect  <response>: 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 cant give rise to left cardiac bulge. 