Article Text
PostScript
Correspondence
Reversed halo sign in pulmonary zygomycosis
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We read with interest the article ‘The atoll sign’ by Walsh and Roberton1 in the November issue of Thorax. The authors report a case of cryptogenic organising pneumonia with the atoll sign, also called the reversed halo sign. As mentioned by the authors, this CT sign was first described in cryptogenic organising pneumonia and was initially considered to be specific for this disease.2 It was subsequently reported in …
Footnotes
Competing interests None.
Provenance and peer review Not commissioned; not externally peer reviewed.