Multiple choice

Egg-on-side appearance on X-ray chest is seen in

  1. tetralogy of fallot

  2. uncorrected TGA

  3. tricuspid atresia

  4. ebstein's anomaly
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B Correct answer
Explanation

The egg-on-side appearance (also called egg-on-its-side sign) is a classic radiological finding in uncorrected transposition of the great arteries (TGA). It results from the abnormal position of the aorta and pulmonary artery on chest X-ray, creating a silhouette that resembles an egg lying on its side rather than standing upright. This sign is specific to TGA and helps differentiate it from other congenital heart diseases.

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