Carcinomas of the skin can be classified using the TNM coding system.
Tumors excluded:
(1) malignant melanoma
(2) carcinoma of the penis, eyelid and vulva
|
Group |
Finding |
Code |
|
T |
carcinoma in situ |
Tis |
|
|
tumor <= 2 cm in maximum dimension |
T1 |
|
|
tumor > 2 cm and <= 5 cm in maximum dimension |
T2 |
|
|
tumor > 5 cm in maximum dimension |
T3 |
|
|
tumor invasion into deep extradermal structures (bone, cartilage, skeletal muscle) |
T4 |
|
N |
no regional lymph node metastasis |
N0 |
|
|
regional lymph node metastasis |
N1 |
|
M |
distant metastasis cannot be assessed |
Mx |
|
|
no distant metastasis |
M0 |
|
|
distant metastasis |
M1 |
If multiple separate skin cancers are present, the TNM designation is assigned for the one with the greatest extent, with the total number of tumors listed afterwards in parentheses (for example, T3(4)).
|
TNM Designation |
Stage |
|
Tis N0 M0 |
0 |
|
T1 N0 M0 |
I |
|
T2-3 N0 M0 |
II |
|
T4 N0 M0 T1-4 N1 M0 |
III |
|
T1-4 N0-1 M1 |
IV |
Specialty: Hematology Oncology, Surgery, general, Dermatology
