We treated a rare case of aneurysm of the internal mammary artery-pulmonary
artery fistula in a 32-year-old woman with unrepaired pulmonary atresia an
d ventricular septal defect. This aneurysm communicated with the pulmonary
artery system through an aortopulmonary collateral. Aneurysmectomy was succ
essful. (C) 2001 by The Society of Thoracic Surgeons.