Type 3c truncus arteriosus. Case report with clinical and surgical implications.

An infant with type 3c truncus arteriosus of Collett and Edwards is reported. In this anomaly, the left pulmonary artery arisesfrom the left lateral wall of the truncus and the right pulmonary artery originatesfrom a rght-sided ductus arteriosus. Only two reports of this malformation have been described previously. Precise anatomical diagnosis is ofimportance since some of these patients may have a small persistent ductus arteriosus and right pulmonary artery, so that surgical correction is not feasible. This rare anomaly is discussed and comment made on the surgical and clinical implications.