We report the case of a young woman who died from rupture of an aneurysmal dilatation of the left pulmonary artery. She suffered from tricuspid atresia type To and underwent a classic Glenn anastomosis at the age of 11 months; at 11 years a direct laterolateral anastomosis was constructed between the ascending aorta and the left pulmonary artery rather than a Fontan procedure for technical reasons. She subsequently developed severe pulmonary hypertension and an aneurysmal dilatation of the left pulmonary artery and was refused any further surgical correction.