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Correspondence
Atoll sign or reversed halo sign? Which term should be used?
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  1. Edson Marchiori1,
  2. Klaus L Irion2,
  3. Gláucia Zanetti1,
  4. Bruno Hochhegger1
  1. 1Rio de Janeiro Federal University, Rio de Janeiro, Brazil
  2. 2Liverpool Heart and Chest Hospital, NHS Trust, Liverpool, UK
  1. Correspondence to Edson Marchiori, Rio de Janeiro Federal University, Rio de Janeiro, Brazil, Rua Thomaz Cameron, 438. Valparaiso, Petrópolis 25.685.120, Brazil; edmarchiori{at}gmail.com

https://doi.org/10.1136/thx.2010.155481

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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 …

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