A Nautilus kidney

Bo Sheng Wu, Yang Ho, Chih Yu Yang*

*Corresponding author for this work

Research output: Contribution to journalComment/debate


We report a 71-year-old woman who presented with unilateral flank pain and sepsis. A computed tomographic (CT) scan demonstrated left-sided hydronephrosis. Subsequent percutaneous nephrotomy drainage showed pus-like material, confirming the diagnosis of pyonephrosis. The ureteral stricture was caused by previous radiation injury for cervical cancer in this ESRD patient who was on chronic dialysis for years. In our case, the grade IVB hydronephrosis is a result of an extremely atrophic kidney, pyonephrosis, and ureteral stricture. The CT section of pyonephrosis in an extremely atrophic kidney resembles a sagittal section of a Nautilus shell, as the shell corresponds to the diffusely thinned renal cortex.

Original languageEnglish
Pages (from-to)971-972
Number of pages2
JournalClinical and Experimental Nephrology
Issue number10
StatePublished - 1 Oct 2020


  • Atrophic kidney
  • ESRD
  • Pyonephrosis


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