Transposition of the great arteries

Case contributed by Dr Vincent Tatco


Patient is cyanotic since birth and in respiratory distress.

Patient Data

Age: Neonate
Gender: Female

There is globular or ovoid appearance of the heart with apparent narrowing of the superior mediastinum (egg-on-a-string sign).

Annotated image

Annotated image showing the egg-on-a-string sign.

Author: Vincent Tatco

License: CC-NC-BY-SA

Case Discussion

This case shows the radiographic appearance of the cardiomediastinal silhouette in a diagnosed case of D-loop transposition of the great arteries

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