From the case: Crescent moon (photo)

Modality: Photo

Used in the following article:

  • Calyceal crescent sign - “ The calyceal crescent sign (Dunbar crescents) refers to the early intravenous pyelogram (IVP) appearance of markedly dilated renal calyces. It is ...”
  • Air crescent sign (lung) - “ An air crescent sign describes the crescent of air that can be seen in invasive aspergillosis, semi-invasive aspergillosis or other processes that...”
  • Crescent in a doughnut sign - “ The crescent in a doughnut sign refers to the transverse ultrasound appearance of intestinal intussusception, and is a variation of the target sig...”
  • Crescent sign of arterial dissection - “ The crescent sign refers to the high signal crescent seen in the wall of a vessel when dissected. This may be seen both on T1 or T2 sequences depe...”

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