Preferred Label : snowman sign;
RADLEX synonyms : snowman heart; figure-8 sign of heart; figure-eight sign of heart;
Definition : Cardiac and mediastinal shadows produce a snowman shape on a frontal radiograph. Suggests
type 1 total anomalous pulmonary venous return; right atrium and ventricle are enlarged,
and abnormal pulmonary vein causes enlargement of the mediastinum.;
Source : Eisenberg, Ronald L. Atlas of Signs in Radiology.;
Origin ID : RID35555;
Associated condition(s)
Cardiac and mediastinal shadows produce a snowman shape on a frontal radiograph. Suggests
type 1 total anomalous pulmonary venous return; right atrium and ventricle are enlarged,
and abnormal pulmonary vein causes enlargement of the mediastinum.
