Left cardiac border bulge can be seen in all, except -: (A) Enlarged azygous vein, (B) Left appendicular overgrowth, (C) Coronary aery aneurysm, (D) Pericardial defect
Answer is A. 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.