BACKGROUND
A 54-year-old woman has had aggressive rheumatoid arthritis for several years. The patient developed rheumatoid lung disease for which she required treatment with corticosteroids. More recently, she developed recurrent episodes of a small amount of hemoptysis. A chest radiograph and CT scan are obtained. What is the diagnosis?
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Hint
The air crescent sign is also described as the air meniscus sign.
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Author:
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Sat Sharma, MD
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Associate Professor, University of Manitoba, Department of Medicine, Division of Pulmonary Medicine
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eMedicine Editor:
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Sean Tsuyuki, MD
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University of Manitoba
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eMedicine Case
