Moon (or Eid) Crescent Sign of the Femoral Head

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...

Avascular Necrosis of the Femoral Head: Are Any Genes Involved?

Avascular necrosis of the femoral head (ANFH) is a pathologic process that results from interruption of blood supply to the femur bone resulting in the death of bone cells and collapse of the femoral head. Nontraumatic ANFH continuesto be a significant challenge to orthopedic surgeons. While the exact mechanisms remain elusive, many new insights have emerged from research in the last decade tha...

Trauma or Tumor? The Nail Splay Sign

'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 ...

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...