Pericardial cyst in a one-year-old boy with ventricular septal defect and patent ductus arteriosus.

Background: Pericardial cysts are rare, with the most common etiology being congenital. Ventricular septal defect is the most common congenital heart disease in children. However, the combination of pericardial cyst, ventricular septal defect, and patent ductus arteriosus is extremely rare.