The findings on chest radiography varies depending on the type of anatomic variant of total anomalous pulmonary venous connection (TAPVC). However, the findings are not useful in making the diagnosis.

• Unobstructed:
  • Snowman sign : A large supracardiac shadow due to anomalous pulmonary vein and persistent left superior vena cava can be seen, which together with normal cardiac shadow forms a snowman appearance.
  • Mild dilatation of the pulmonary arteries.
  • Mild cardiomegaly

• Obstructed:
  • Pulmonary vein congestion
  • Dilatation of the pulmonary arteries
  • Pulmonary edema