AJCC Melanoma staging

The staging was updated during 2016

AJCC - 2017

Definition of Primary Tumour –Melanoma

T Category

Thickness

Ulceration status

TX:           Cannot be assessed

T0:           No evidence of primary tumour

Tis: in situ

N/A

N/A

T1

≤1 mm

Unknown / unspecified

T1a

<0.8 mm

Without

T1b

<0.8 mm

With


0.8-1 mm

With or without

T2

>1 - 2 mm

Unknown / unspecified

T2a

>1 - 2 mm

Without

T2b

>1 - 2 mm

With

T3

>2 - 4 mm

Unknown / unspecified

T3a

>2 - 4mm

Without

T3b

>2 - 4 mm

With

T4

>4 mm

Unknown / unspecified

T4a

>4 mm

Without

T4b

>4 mm

With