Primary tumor (T)
- pTX: primary tumor cannot be assessed
- pT0: no evidence of primary tumor
- pT1: tumor confined to eye with no optic nerve or choroidal invasion
- pT2: tumor with minimal optic nerve or choroidal invasion
- pT2a: tumor superficially invades optic nerve head but does not extend past lamina cribrosa OR tumor exhibits focal choroidal invasion, but not both
- pT2b: tumor superficially invades optic nerve head but does not extend past lamina cribrosa AND exhibits focal choroidal invasion
- pT3: tumor with significant optic nerve or choroidal invasion
- pT3a: tumor invades optic nerve past lamina cribrosa but not to surgical resection line OR tumor exhibits massive choroidal invasion, but not both
- pT3b: tumor invades optic nerve past lamina cribrosa but not to surgical resection line AND exhibits massive choroidal invasion
- pT4: tumor invades optic nerve to resection line OR exhibits extraocular extension elsewhere, but not both
- pT4a: tumor invades optic nerve to resection line but no extraocular extension identified
- pT4b: tumor invades optic nerve to resection line AND extraocular extension identified
