Acquired coronary artery-pulmonary artery connection.

We report a patient who underwent resection of a mediastinal tumor with postoperative irradiation. Cardiac catheterization fifteen years later demonstrated coronary artery-pulmonary artery fistulas from both the right and left coronary arteries. This case report raises the issue of whether external beam irradiation may have been integral in neovascularization and the development of this acquired abnormality.