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On the edge of the film…
  1. Helen Williams
  1. Correspondence to Dr Helen Williams, Radiology Department, Birmingham Children's Hospital, Steelhouse Lane, Birmingham, B4 6NH, UK; helen.williams{at}

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From questions on page 15.

ANSWER TO Question 1

The correct answer is E: Chilaiditi's sign, or interposition of bowel between the right hemidiaphragm and the liver. It is usually an incidental finding and is rarely seen in children. However, it is important to recognise because it can be mistaken for pneumoperitoneum. The involved bowel is usually the …

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