2009 UICC Staging System for Cutaneous Squamous Cell Carcinoma

The International Union Against Cancer (UICC) revised its staging system for cutaneous squamous cell carcinoma in 2009.

Patient selection: cutaneous squamous cell carcinoma

Parameters:

(1) greatest dimension in centimeters

(2) invasion into non-bone deep structures (muscle, cartilage, etc)

(3) invasion into bone of the axial skeleton

(4) invasion into non-axial bone

(5) invasion into the orbit

(6) direct perineural invasion of skull base

Greatest Dimension	Invasion into Specific Structures	Stage
<= 2 cm	none	T1
> 2 cm	none	T2
NA	non-bone deep structures, non-axial bone and/or orbit	T3
NA	axial bone and/or direct perineural invasion of skull base	T4

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