Calyceal crescents (of Dunbar and Nogrady)

  • Bradley A. Cagle
  • Raymond B. Dyer
Classics in Abdominal Radiology


Compliance with ethical standards



Conflict of interest

The authors declare that they have no conflict of interest.

Research involving human and animal rights

This article does not contain any studies with human participants or animals performed by any of the authors.

Informed consent

Not applicable.


  1. 1.
    Dunbar JS, Nogrady MB (1970) The calyceal crescent-a roentgenographic sign of obstructive hydronephrosis. AJR 110:520–528CrossRefGoogle Scholar
  2. 2.
    Khanna G (2005) The calyceal crescent sign. Radiology 236:653–654CrossRefPubMedGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Radiology, Wake Forest Baptist Medical CenterWake Forest University School of MedicineWinston-SalemUSA

Personalised recommendations