Anomalous origin of the left coronary artery from the pulmonary artery in an asymptomatic adult.

Anomalous origin of the left coronary artery from the pulmonary artery is a rare congenital anomaly with a mortality of 90% in the first year of life, if not surgically corrected. Adult presentation of the anomalous origin of the left coronary artery from the pulmonary artery syndrome is extremely rare but may occur if a well-developed collateral circulation from right coronary artery is present. We present the case of a 22-year-old asymptomatic female with anomalous origin of the left coronary artery from the pulmonary artery.