Conjunctival melanoma: the eighth edition of the American Joint Committee on Cancer (AJCC) staging manual
| Definition of primary tumour (T) | |||
|---|---|---|---|
| Clinical tumour (cT) | Pathological tumour (pT) | ||
| cT category | cT criteria | pT category | pT criteria |
| TX | Primary tumour cannot be assessed | TX | Primary tumour cannot be assessed |
| T0 | No evidence of primary tumour | T0 | No evidence of primary tumour |
| Tis | Melanoma confined to conjunctival epithelium | ||
| T1 | Tumour of the bulbar conjunctiva | ||
| T1a | <1 quadrant | T1a | Tumour of the bulbar conjunctiva with invasion of the substantia propria, not more than 2.0 mm in thickness |
| T1b | ≥1 to <2 quadrants | ||
| T1c | ≥2 to <3 quadrants | T1b | Tumour of the bulbar conjunctiva with invasion of the substantia propria, more than 2.0 mm in thickness |
| T1d | ≥3 quadrants | ||
| T2 | Tumour of the non-bulbar (forniceal, palpebral, tarsal) conjunctiva and tumour involving the caruncle | ||
| T2a | Noncaruncular, and ≤1 quadrant of the non-bulbar conjunctiva involved | T2a | Tumour of the non-bulbar conjunctiva involved with invasion of the substantia propria, not more than 2.0 mm in thickness |
| T2b | Noncaruncular, and >1 quadrant of the non-bulbar conjunctiva involved | ||
| T2c | Caruncular, and ≤1 quadrant of the non-bulbar conjunctiva involved | T2b | Tumour of the non-bulbar conjunctiva with invasion of the substantia propria, more than 2.0 mm in thickness |
| T2d | Caruncular, and >1 quadrant of the non-bulbar conjunctiva involved | ||
| T3 | Tumour of any size with local invasion | ||
| T3a | Globe | T3a | Globe |
| T3b | Eyelid | T3b | Eyelid |
| T3c | Orbit | T3c | Orbit |
| T3d | Nasolacrimal duct and/or lacrimal sac and/or paranasal sinuses | T3d | Nasolacrimal duct and/or lacrimal sac and/or paranasal sinuses |
| T4 | Tumour of any size with invasion of the central nervous system | T4 | Tumour of any size with invasion of the central nervous system |
em dash, not calculable.