renal hilum

{{Short description|Central fissure of the kidney}}

{{Infobox anatomy

| Name = Hilum of kidney

| Latin = hylus renale

| Image = Blausen_0592_KidneyAnatomy_01.png

| Caption = Kidney anatomy, with hilum labeled at upper left.

| Image2 = Kidney PioM.png

| Caption2 ={{div col|style=text-align:left; font-size:smaller|colwidth=30em}}{{ubl|1. Renal pyramid | 2. Interlobular artery | 3. Renal artery | 4. Renal vein | 5. Renal hilum | 6. Renal pelvis | 7. Ureter | 8. Minor calyx | 9. Renal capsule | 10. Inferior renal capsule | 11. Superior renal capsule | 12. Interlobar vein | 13. Nephron | 14. Renal sinus | 15. Major calyx | 16. Renal papilla | 17. Renal column}}{{div col end}}

| System =

}}

The renal hilum or renal pedicle is the recessed central fissure of the kidney where its vessels, nerves and ureter pass. The medial border of the kidney is concave in the center and convex toward either extremity; it is directed forward and a little downward. Its central part presents a deep longitudinal fissure, bounded by prominent overhanging anterior and posterior lips. This fissure is a hilum that transmits the vessels, nerves, and ureter. From anterior to posterior, the renal vein exits, the renal artery enters, and the renal pelvis exits the kidney.

On the left hand side the hilum is located at the L1 vertebral level and the right kidney at level L1-2. The lower border of the kidneys is usually alongside L3.