Idiopathic dilatation of the pulmonary artery-a case report.

Idiopathic dilatation of the pulmonary artery (IDPA) is a rare anomaly presenting with enlargement of the pulmonary artery in the absence of an identifiable cause. The natural history of this silent but potentially life-threatening disease can be unpredictable. We report a case of IDPA in an 80-year-old female with a massively dilated pulmonary artery.