Article Text
PostScript
Correspondence
Atoll sign or reversed halo sign? Which term should be used?
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We read with great interest the article by Walsh and Robertson1 reporting a case of cryptogenic organising pneumonia. The authors included wonderful images of a CT pattern they called the ‘atoll sign’, which has been described by other authors as the ‘reversed halo …
Footnotes
Competing interests None.
Provenance and peer review Not commissioned; not externally peer reviewed.