Carcinoma of Skin (excluding eyelid, head and neck, perianal, vulva, and penis)
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Carcinoma of Skin (excluding eyelid, head and neck, perianal, vulva, and penis) (ICD‐O‐3 C44.5‐7, C63.2)*
The classification applies only to carcinomas, excluding Merkel cell carcinoma. There should be histological confirmation of the disease and division of cases by histological type. The following are the procedures for assessing T, N, and M categories: T categories Physical examination N categories Physical examination and imaging M categories Physical examination and imaging Note * The AJCC only includes the classification for skin carcinoma of the head and neck.
Regional Lymph Nodes The regional lymph nodes are those appropriate to the site of the primary tumour. See page 132.
TNM Clinical Classification T – Primary Tumour TX T0 Tis
Primary tumour cannot be identified No evidence of primary tumour Carcinoma in situ
T1 Tumour 2 cm or less in greatest dimension T2 Tumour >2 cm and ≤4 cm in greatest dimension T3 Tumour >4 cm in greatest dimension or minor bone erosion or perineural invasion or deep invasion* T4a Tumour with gross cortical bone/marrow invasion T4b Tumour with axial skeleton invasion including foraminal involve ment and/or vertebral foramen involvement to the epidural space Note * Deep invasion is defined as invasion beyond the subcutaneous fat or >6 mm (as meas ured from the granular layer of adjacent normal epidermis to the base of the tumour);
Skin
Rules for Classification*