This specimen has tetralogy of Fallot with pulmonary
atresia. The pulmonary supply is through multiple systemicto-
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.