Part of Cancer staging guidance sheets
Carcinoma of skin of the eyelid (ICD10 C44.1)
Introduction
This is the data sheet for TNM 9th edition staging of the carcinoma of skin of the eyelid (ICD10 C44.1)
For more detailed information regarding TNM staging, please see pages 141-143 of the UICC TNM 9 book.
Stage groupings
|
Stage Group |
T stage |
N stage |
M stage |
|---|---|---|---|
|
Stage 0 |
Tis |
N0 |
M0 |
|
Stage IA |
T1 |
N0 |
M0 |
|
Stage IB |
T2a |
N0 |
M0 |
|
Stage IIA |
T2b, T2c, T3 |
N0 |
M0 |
|
Stage IIB |
T4 |
N0 |
M0 |
|
Stage IIIA |
Any T |
N1 |
M0 |
|
Stage IIIB |
Any T |
N2 |
M0 |
|
Stage IV |
Any T |
Any N |
M1 |
TNM clinical classification
T - primary tumour
|
T value |
Description |
|---|---|
|
cTX |
Primary tumour cannot be assessed |
|
cT0 |
No evidence of primary tumour |
|
cTis |
Carcinoma in situ |
|
cT1 |
Tumour 10 mm or less in greatest dimension cT1a - Not invading the tarsal plate or eyelid margin cT1b - Invades tarsal plate or eyelid margin cT1c - Involves full thickness of eyelid |
|
cT2 |
Tumour >10 mm, but 20 mm or less in greatest dimension cT2a - Not invading the tarsal plate or eyelid margin cT2b - Invades the tarsal plate or eyelid margin cT2c - Involves full thickness of eyelid |
|
cT3 |
Tumour > 20 mm in greatest dimension cT3a - Not invading the tarsal plate or eyelid margin cT3b - Invades tarsal plate or eyelid margin cT3c - Involves full thickness of eyelid |
|
cT4 |
Any eyelid tumour that invades adjacent ocular, or orbital, or facial structures cT4a - Tumour invades ocular or intraorbital structures cT4b - Tumour invades (or erodes through) the bony walls of orbit or extends to paranasal sinuses or invades the lacrimal sac/nasolacrimal duct or brain |
N - regional lymph nodes
|
N value |
Description |
|---|---|
|
cNX |
Regional lymph nodes cannot be assessed |
|
cN0 |
No evidence of lymph node involvement |
|
cN1 |
Metastasis in a single ipsilateral regional lymph node, 3 cm or less in greatest dimension |
|
cN2 |
Metastasis in a single ipsilateral lymph node more than 3 cm in greatest dimension or in bilateral or contralateral lymph nodes or multiple ipsilateral lymph nodes |
M - distant metastasis
|
M value |
Description |
|---|---|
|
M0 |
No distant metastasis |
|
M1 |
Distant Metastasis |
TNM pathological classification
pT - primary tumour
The pT and pN categories correspond to the cT and cN categories
Last edited: 16 January 2026 3:48 pm
