Bidirectional Glenn with interruption of antegrade pulmonary blood flow: Which is the preferred option: Ligation or division of the pulmonary artery?

We report a rare complication of massive aneurysm of the proximal ligated end of the main pulmonary artery which occurred in the setting of a patient with a functionally univentricular heart and increased pulmonary blood flow undergoing superior cavopulmonary connection. Awareness of this possibility may guide others to electively transect the pulmonary artery in such a clinical setting.