Adult ALCAPA Syndrome-Anomalous Origin of Left Coronary Artery from Pulmonary Artery: A Rare Coronary Artery Anomaly Diagnosed by 256-Slice Computed Tomography

We are presenting a rare case of anomalous origin of left coronary artery from the pulmonary artery (ALCAPA) in an adult patient. The patient underwent coronary CT angiography for exertional dyspnoea, suspected as coronary artery disease; however there were no atherosclerotic plaques. There was anomalous origin of left coronary artery from pulmonary artery. Conventional catheter angiography confirmed the origin of left coronary artery from pulmonary artery, which was retrogradely filling through right coronary artery.