This x-ray suggests:
a) Mediastinal mass
b) Mass lesion in the lung
c) Severe pulmonary arterial hypertension
d) None of the above
X-ray chest PA view in severe pulmonary hypertension as evidenced by the huge main pulmonary artery segment on the left side with overlapping shadow of left branch pulmonary artery, huge right pulmonary artery overlapped by large end on vessels and peripheral pruning (centralised flow).