This is a very unusual case with unexpected findings. In spite of sophisticated investigation tests such as MRI and pul¬monary angiogram, it may be very difficult to identify the nature of pulmonary artery stenosis or occlusion.
T. P. Doyle, I. M. Loyd Robbins, “Percutaneous pulmo?nary artery and vein stenting: A novel treatment for me?diastinal fibrosis,” American Journal of Respiratory and Critical Care Medicine, Vol. 164, No. 4, August 2001, pp. 657-660.