Image Question-25


What is the most probable diagnosis?


Case courtesy of Vincent Tatco, Radiopaedia.org. From the case rID: 43062

A. Tetralogy of Fallot

B. Transposition of the great arteries

C. Corrected transposition of the great arteries

D. Total Anomalous Pulmonary Venous Connection



Hallmark of TGA


  1. ventriculoarterial discordance
  2. classic “egg on a string” appearance on chest roentgenograms

Found in one third of patients.


Egg-on-a-string sign


Case courtesy of Vincent Tatco, Radiopaedia.org. From the case rID: 43062

What is the management line for TGA?


Continuous infusion of prostaglandin E1 – Emergency

Arterial switch procedure


Continuous infusion of prostaglandin E1 is the mainstay of emergent treatment

Followed by surgical arterial switch procedure


Atrial switch – VS – Arterial switch : Which is better?

Arterial switch is accept as a better treatment option for TGA from anatomical and physiological point of view.

Atrial switch, which was an attempt to correct the physiology of transposition but there was significant shortcomings.

The arterial switch sought to address them.

Arterial switch has emerged as an anatomically as well as physiologically appropriate solution for Surgical management of TGA.


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