Giant pulmonary artery aneurysm in a child: Rare complication of congenital heart disease

KEY CLINICAL MESSAGE: This case report aims to increase awareness that pulmonary artery aneurysms may occur as a complication of neglected patent ductus arteriosus and should be sought in children with ill‐treated congenital heart diseases. ABSTRACT: Pulmonary artery aneurysm is a rare anomaly with an autopsy prevalence of 1:14,000. These aneurysms can arise secondary to various etiologies, with congenital causes identified in 25% of cases and congenital heart diseases (CHD) responsible for more than half of these cases. A 12‐year‐old boy with CHD in the form of patent ductus arteriosus (PDA) and irregular clinical follow‐up presented with new onset fatigue of 3 months duration. A physical examination revealed anterior chest wall bulging and a continuous murmur. A chest radiograph showed a smooth left hilar region opacity that has a close relation with the left cardiac border. Transthoracic echocardiogram shows no progression from the previous one; there was a large PDA and pulmonary hypertension, but no further information was available. Computed tomography angiography revealed a giant aneurysm of the main pulmonary artery (PA), with a maximum diameter of 8.6 cm, and dilatation of its branches of 3.4 and 2.9 cm for the right and left PA, respectively.