Imaging Case of the Week 208 Answer

The 3 oesophageal constrictions are:

  • At the level of the cricopharyngeal sphincter (C6 vertebra).
  • At the level of the aortic arch.
  • At the level of the lower oesophageal sphincter.

On the frontal chest x-ray, the button battery is seen as a double ring (halo), whereas on the lateral chest x-ray, it has a step off. However, it may be difficult to differentiate between a coin and button battery on x-ray.

A button battery lodged in the oesophagus should be treated as an emergency and needs prompt removal.



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