This specimen has tetralogy of Fallot with pulmonary atresia. The pulmonary supply is through multiple systemic-to-pulmonary collateral arteries. The star shows the connection between one of the collateral arteries and the intrapericardial pulmonary arteries. All the other arteries join with the intrapericardial pulmonary arterial supply, or else supply segments of the lung directly. The task of the clinician is to display the supply of the various collateral arteries and their communications with the intrapericardial pulmonary arteries.