V.3.7.5 Kidney Parenchyma - Fuhrman Nuclear Grade

(Site: kidney parenchyma excluding lymphomas)

Use these instructions for cases diagnosed on or after 01/01/2014 only.

For cases diagnosed on or before 12/31/2013, see Section V.3.5.10

Coding Instructions:

• Fuhrman nuclear grade is a four- grade system based on nuclear diameter and shape, the prominence of nucleoli, and the presence of chromatin clumping in the highest grade.
• The Fuhrman Nuclear Grade should be used to code grade for kidney parenchyma.

• Do not use for kidney renal pelvis.

• If grade cannot be coded using the Furman nuclear grade table below, then use Grade rules for solid tumors, see Section V.3.7.2

Fuhrman Nuclear Grade/Grade

Note: This grading system is coded in a site-specific factor for the applicable CS schema.

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