| snowman abnormality | A radiographic appearance associated with total anomalous drainage of the pulmonary venous circulation into enlarged right and anomalous left venae cavae, that produces a globular density above the heart; the silhouette suggests the figure 8. Synonym: snowman abnormality. (05 Mar 2000) |
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| snowman sign | <radiology> Supracardiac TAPVR, (total anomalous pulmonary venous return), return to persistent left superior vena cava, aka: vertical vein (12 Dec 1998) |
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| abnormality | 1. The state or quality of being abnormal. 2. An anomaly, deformity, malformation, impairment, or dysfunction. (05 Mar 2000) |
| karyotypic abnormality | Abnormality in the number form or structure of chromosomes. Particular abnormalities are associated with particular sub- types of leukaemia. (27 Sep 1997) |
| figure-of-8 abnormality | A radiographic appearance associated with total anomalous drainage of the pulmonary venous circulation into enlarged right and anomalous left venae cavae, that produces a globular density above the heart; the silhouette suggests the figure 8. Synonym: snowman abnormality. (05 Mar 2000) |