Presentation
Cough.
Patient Data
Age: 75 years
Gender: Male
From the case:
Atoll sign
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Large area of ground glass attenuation surrounded by crescent shape consolidation seen in the right lung giving the appearance of reversed halo sign (atoll sign).
Mediastinal and hilar lymphadenopathy.
Case Discussion
Differential diagnosis for reversed halo sign are:
- cryptogenic organising pneumonia
- Infection
- sarcoidosis
- wegener granulomatosis
- pulmonary infarct
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