Anechoic crescent sign

Pulmonary gangrene and the air crescent sign.

BACKGROUND A study was carried out to increase familiarity with the aetiology, pathogenesis, and radiographic features that characterise pulmonary gangrene. PATIENTS Four patients with one of the disorders vasoinvasive aspergillosis, infarcted tuberculous cavity, chronic necrotising aspergillosis, and gangrene due to Pseudomonas aeruginosa were selected because they showed the variations of t...

'Monod' and 'air crescent' sign in aspergilloma.

To cite: Sharma S, Dubey SK, Kumar N, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/ bcr-2013-200936 DESCRIPTION A 62-year-old male patient presented with a symptom of haemoptysis for 15 days. There was history of pulmonary Koch’s for which he took complete treatment 11 years ago. In the CT scan of the chest, there was an irregular-shaped cavity in the right ...

Anechoic vs. Semi Anechoic Rooms

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...

Air crescent sign: not always due to fungal infection.

A 65-year-old woman was admitted to the hospital due to hemoptysis once for 1 day. Cough with some whitish sputum but no fever or body weight loss was noted. Her medical history included hypertension, which was under regular medical control. She denied any smoking history. A physical examination revealed no remarkable findings. The chest radio-graph obtained on hospital admission revealed suspe...