Bivalved kidney showing a textbook appearance of Renal Cell | Figure 1

Bivalved Kidney Showing Renal Cell Carcinoma

Bivalved kidney showing a textbook appearance of Renal Cell Carcinoma. The orange-yellow color is typical and not representative of necrosis. At the tip of the blue arrow, you can see the mass appears encapsulated and confined to the renal cortex. The mass abuts but does not involve the renal sinus fat or the renal pelvis (yellow arrow).

Invasion of renal sinus fat, renal pelvis, or perinephric fat will change the patient’s stage. Beyond that, the actual size of the tumor can change the stage as well. For kidney cancers, the important measurements to keep in mind are 4cm, 7cm, and 10cm. A 4cm mass is T1a, between 4cm and 7cm and you’re at T1b, over 7cm but under 10cm and you’re T2a, and once the tumor is more than 10cm in size, it becomes a T2b.

All T1-2 stages are for when the tumor is confined to the kidney and not invading the Renal Vein.

In this case, the tumor was caught early and, presuming no lymph node involvement or distant metastases, this surgery is likely curative.

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