A rare complex association of truncus arteriosus with anomalous left coronary artery from the pulmonary artery: A case of rare congenital deformity.

Anomalous left coronary artery from the pulmonary artery (ALCAPA) is a rare congenital deformity, and its association with truncus arteriosus (TA) has been infrequently described in medical literature. We report a case of a 3-year-old child presenting with failure to thrive and recurrent respiratory infections, who was diagnosed with truncus arteriosus type 1 and an anomalous left coronary artery originating from the pulmonary artery. The embryological basis of both TA and ALCAPA involves disruptions in the normal development of the aorticopulmonary septum and coronary arteries.