sites of stone impaction
Last reviewed 07/2021
In the kidney important sites of impaction include:
- minor and major calyx system
- pelviureteric junction
In the ureter:
- region of the pelvic brim - where the ureter arches over the iliac vessels
- vesicoureteric junction - the most narrow part of the normal urinary tract
Stones in the bladder are often formed in situ, rather than originating from the upper tracts. Stones that do reach the bladder from the upper tracts are likely to pass easily down the urethra.
| Stone location | Common symptoms |
| Renal | vague flank pain, hematuria |
| in the proximal ureter | flank pain, renal colic, upper abdominal pain |
| in the mid section of ureter | renal colic, anterior abdominal pain, flank pain |
| distal ureter | renal colic, dysuria, urinary frequency, anterior abdominal pain, flank pain |