Where is the renal pelvis located?

May 16, 2023 Source: Cainiu Health
Dr. Zhao Xinju
Introduction
The renal pelvis is a funnel-shaped, flattened sac formed by the convergence of the major calyces. In adults, the capacity of the renal pelvis is approximately 3–10 mL. It is located within the medial aspect of the renal sinus, with its surface projection situated at the angle formed between the twelfth rib and the lateral border of the erector spinae muscle. Diseases related to the renal pelvis—including pyelonephritis, kidney stones, and renal pelvic tumors—require prompt medical attention at a hospital when abnormal symptoms arise.

Under normal circumstances, the renal pelvis is located within the renal sinus. A detailed analysis is as follows:

The renal pelvis is a funnel-shaped sac formed by the convergence of the major calyces. In adults, the capacity of the renal pelvis is approximately 3–10 mL, and it is situated on the medial side of the renal sinus. Its surface projection lies at the angle formed between the 12th rib and the lateral border of the sacrospinalis muscle. If pathogenic bacteria from a urinary tract infection ascend to the kidney, they may cause inflammation, leading to pyelonephritis. Additionally, if certain components in the urine form stones within the renal pelvis, this can result in kidney stones. Moreover, malignant changes in the mucosa of the renal pelvis or calyces may lead to renal pelvic tumors.

Different types of renal pelvic diseases present with varying symptoms and require different treatments. If a patient experiences pain, hematuria (blood in urine), proteinuria (protein in urine), or other symptoms related to the kidneys, renal pathology should be suspected. It is advisable to seek prompt medical evaluation at a hospital, including laboratory tests, imaging studies, and other relevant examinations, to determine the exact underlying cause. Treatment should be administered according to a physician's targeted recommendations. Patients should avoid self-treatment to prevent inappropriate management. During treatment, strict adherence to medical advice and adequate rest are essential for effective disease control.


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