Renal pelvis (right)
Pelvis renalis
UrinaryOrgansAbdomenRight side
- What it is
- Funnel-shaped expansion of the upper ureter lying in the renal sinus, formed by the union of the major calyces and emerging through the hilum behind the renal vessels.
- Function
- Gathers urine from the calyces and funnels it into the ureter.
- Size
- Holds about 5–10 mL; narrows to 2–3 mm at the pelviureteric junction.
- Clinical note
- The pelviureteric junction is the first of the three narrowings where kidney stones tend to lodge.