What are the non-parenchymal etiologies of renal/kidney flank pain?

Updated: Dec 11, 2019
  • Author: Bradley C Gill, MD, MS; Chief Editor: Bradley Fields Schwartz, DO, FACS  more...
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Most non-parenchymal etiologies of renal pain involve obstruction of the urinary tract. Such obstruction, whether intrarenal, in the proximal ureter, or as distal as the bladder or urethra, can produce classic renal colic due to dilation of the intrarenal collecting system. Additionally, the upper urinary tract itself is well innervated and irritation by a foreign body (eg, kidney stone, ureteral stent) can trigger flank pain even if no hydronephrosis is present.

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