Pulmonary gangrene and the air crescent sign.

Fluid rim sign: a new ultrasonographic sign of soft tissue aspergillosis.

The air crescent sign is a well-known important diagnostic finding in invasive pulmonary aspergillosis. Herein we report a distinctive but rare ultrasonographic appearance in a patient with myositis secondary to Aspergillus flavus infection, which can be considered as the soft tissue counterpart of the air crescent sign.

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Âspergilloma can be defined as a conglomeration of intertwined aspergillos hyphea matted together with fibrin, mucus and cellular debris within pulmonary cavity or ecstatic bronchus (usually cavitary tuberculosis). Âlthough most patients are asymptomatic, hemoptysis is a common symptom of pulmonary aspergilloma and results in fetal asphyxiation. Most often there is one or two aspergilloma in ...

Reply: Teratoma: another cause of the air-crescent sign.

We read with great interest the well-written article by Tseng and Chen, 1 who described the case of a 65-year-old woman who presented with hemoptysis and a cavitary lesion in the right lung with an air crescent sign and an intracavitary fungus ball-like mass. The final diagnosis was lung carcinoma. The authors highlighted the importance of cavity wall thickness for the differential diagnosis, r...

Significance of halo, reversed halo and air crescent signs in lymphomatoid granulomatosis and pulmonary fungal infections.

We read with interest the article by Lota et al. The authors report a case of lymphomatoid granulomatosis (LG) with an atypical CT finding of crescent sign for LG. Typically, LG patients with lung involvement can present with pulmonary infiltration and may later develop a reversed halo sign, a focal round area of ground-glass attenuation and surrounding airspace consolidation of crescent shape....

The air crescent sign of invasive pulmonary aspergillosis in acute leukaemia.