Renal Pelvis Flashcards

Examine the renal pelvis, its funnel-shaped structure, calyceal connections, urothelial lining, vascular relations, and urinary drainage.

Card 1 of 26Question

What is the renal pelvis?

A funnel-shaped collecting structure that receives urine from the major renal calyces and continues as the ureter.

In This Section

1. What is the renal pelvis?

A funnel-shaped collecting structure that receives urine from the major renal calyces and continues as the ureter.

2. Where is the renal pelvis located?

Primarily within the renal sinus, extending toward or beyond the renal hilum.

3. Which structures drain directly into the renal pelvis?

The major renal calyces.

4. How many major calyces typically contribute to the formation of the renal pelvis?

Usually two or three, although the arrangement varies.

5. What is the normal sequence of urine flow from a renal papilla to the ureter?

Renal papilla, minor calyx, major calyx, renal pelvis, and ureter.

6. At which anatomical junction does the renal pelvis become the ureter?

The ureteropelvic junction, also called the pelviureteric junction.

7. What is the usual anterior-to-posterior arrangement of structures at the renal hilum?

Renal vein, renal artery, and renal pelvis.

8. What type of epithelium lines the renal pelvis?

Transitional epithelium, also called urothelium.

9. What is the function of the umbrella cells lining the renal pelvis?

They form a protective, urine-impermeable barrier that accommodates distension.

10. What connective tissue layer lies beneath the urothelium of the renal pelvis?

The lamina propria.

11. Which type of muscle is present in the wall of the renal pelvis?

Smooth muscle arranged in interlacing bundles.

12. What mechanism propels urine from the renal pelvis into the ureter?

Coordinated peristaltic contractions of smooth muscle.

13. Where do rhythmic contractions of the upper urinary collecting system commonly originate?

Pacemaker regions near the renal calyces and their junctions with the renal pelvis.

14. What is an intrarenal pelvis?

A renal pelvis located predominantly within the renal sinus.

15. What is an extrarenal pelvis?

A normal anatomical variant in which much of the renal pelvis extends outside the renal sinus.

16. What is a bifid renal pelvis?

A collecting system variant involving two renal pelvic divisions that join before forming a single ureter.

17. What is a duplicated renal pelvis?

A congenital variation in which the kidney has two separate collecting pelvic systems.

18. Which arteries primarily contribute to the blood supply of the renal pelvis?

Branches of the renal artery.

19. Where does venous blood from the renal pelvis primarily drain?

Into tributaries of the renal vein.

20. Which autonomic nerve network supplies the renal pelvis?

The renal plexus, with contributions from autonomic nerves accompanying the upper ureter.

21. Where does lymph from the renal pelvis primarily drain?

The lateral aortic, or lumbar, lymph nodes.

22. What is ureteropelvic junction obstruction?

Impaired urinary drainage at the junction between the renal pelvis and ureter.

23. How can an aberrant lower-pole renal vessel contribute to ureteropelvic junction obstruction?

It may cross and externally compress the ureteropelvic junction.

24. What is hydronephrosis?

Dilation of the renal pelvis and calyces caused by impaired urinary drainage or reflux.

25. What is a staghorn calculus?

A large renal stone that occupies the renal pelvis and extends into one or more calyces.

26. What malignant tumor arises from the urothelial lining of the renal pelvis?

Upper tract urothelial carcinoma.