American Urological Association - Kidney: Renal Sinus
Kidney: Renal Sinus
- Fatty compartment along the hilus of kidney that invests the renal calyces, pelvis, blood vessels, lymphatics and nerves (image A) & (image B).
- Renal sinus abuts the renal cortical columns of Bertin without a connective tissue interface.
- Important landmark for staging renal carcinoma (extrarenal extension).
- Requirement for diagnosis of renal sinus invasion by renal carcinoma:
- Tumor cells in direct contact with renal sinus stroma or fat cells.
- Tumor within vessels that are clearly within the renal sinus fat.