Survival Against the Odds: An Exceedingly Uncommon Case of Type A3 Truncus Arteriosus in an Adult Male Thriving without Surgical Intervention

Persistent truncus arteriosus is an uncommon complex congenital heart disease.Without surgical intervention, the prognosis is not good.Very few untreated cases of truncus arteriosus survive to maturity.We report an exceptional case of uncorrected truncus arteriosus surviving into adulthood of Type A3 variant -Van Praagh classification as a 26-year-old male who had well tolerated dyspnea since birth.Our patient showed a single(right) pulmonary artery arising from the common arterial trunk supplying the right lung and absent main and left pulmonary artery with collateral supply to the left lung consistent with the truncus arteriosus Type A3-Van Praagh classification