Calyceal crescent sign
The calyceal crescent sign refers to the early IVP appearance of markedly dilated renal calyces. It is formed by contrast outlining the collecting ducts and ducts of Bellini which are distorted by the associated enlarged calyces. It is a marker of elevated pressure within the renal pelvis.
- 1. Khanna Geetika. “The Calyceal Crescent Sign.” Radiology 236, no. 2 (August 1, 2005): 653-654. doi:10.1148/radiol.2362031411.