What is renal pelvis?

The renal pelvis is a part of the kidney.

It is located in the renal sinus and is mainly a funnel-shaped flat sac synthesized by the greater calices of the kidney. Under normal circumstances, the renal pelvis volume of adults is 3-10 ml. In the case of infection of the urinary tract, pathogenic microorganisms may retrograde infection leading to inflammatory lesions in the renal pelvis, causing pyelonephritis. At this time, there may be tenderness and percussion pain in this area. When stones form in the kidney, stones will also accumulate in this area. The projection of the renal pelvis on the body surface is the angle formed by the 12th rib and the outer edge of the sacrospinous muscle.