Urologic radiology

, 1:17

Nonvisualized (“phantom”) renal calyx: Causes and radiological approach to diagnosis


  • Richard E. Brennan
    • Department of RadiologyThomas Jefferson University Hospital
  • Howard M. Pollack
    • Department of RadiologyHospital of the University of Pennsylvania

DOI: 10.1007/BF02926595

Cite this article as:
Brennan, R.E. & Pollack, H.M. Urol Radiol (1980) 1: 17. doi:10.1007/BF02926595


A calyx which fails completely to opacify on excretory urography (phantom calyx) is often the harbinger of serious underlying renal disease. Causes of a phantom calyx include tuberculosis, tumor, calculus, ischemia, trauma, and congenital anomaly. The pathologic basis for the radiographic findings in each of these entities is described and an overall approach to diagnosis is set forth.

Key words

Calyx, disease ofKidneyExcretory urography
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© Springer-Verlag 1979