Name	Value
NAME	RETINOBLASTOMA (PATH)
T-CLASS ENCODING	CBA CODE: TX ACOS CODE: TX Intraneural > lamina cribrosa CODE: T4a ACOS CODE: T4A @ line of resection/other extra-ocular CODE: T4b ACOS CODE: T4B NA CODE: NA ACOS CODE: NA NET CODE: T0 ACOS CODE: T0 25% or less of retina CODE: T1 ACOS CODE: T1 > 25% but not > 50% of retina CODE: T2 ACOS CODE: T2 > 50%/beyond retina but intra-ocular CODE: T3 ACOS CODE: T3 > 50%/in vitreous CODE: T3a ACOS CODE: T3A Optic nerve to lamina cribrosa CODE: T3b ACOS CODE: T3B Ant chamber/thickening of uvea/intrascleral CODE: T3c ACOS CODE: T3C Extra-ocular CODE: T4 ACOS CODE: T4
6TH EDITION (T) CODES	DESCRIPTION: CBA CODE: TX DESCRIPTION: Massively invades choroid CODE: T3b DESCRIPTION: Optic nerve through lamima cribosa and choroid CODE: T3c DESCRIPTION: Extraocular tumor extension CODE: T4 DESCRIPTION: NA CODE: NA DESCRIPTION: NET CODE: T0 DESCRIPTION: Confined to retina/vitreous/subretinal space CODE: T1 DESCRIPTION: Minimal invasion of optic nerve/optic coats CODE: T2 DESCRIPTION: Optic nerve up to lamina cribosa CODE: T2a DESCRIPTION: Choroid focally CODE: T2b DESCRIPTION: Optic nerve up to lamina cribosa/choroid focally CODE: T2c DESCRIPTION: Significant invasion of optic nerve/optic coats CODE: T3 DESCRIPTION: Optic nerve through lamina cribosa CODE: T3a
6TH EDITION (T) CODE HELP	Primary Tumor Pathologic (T) T2b Tumor invades choroid focally T2c Tumor invades optic nerve up to, but not through, the level of the lamina cribrosa and invades the choroid focally T3 Significant invasion of the optic nerve and/or optic coats T3a Tumor invades optic nerve through the level of the lamina cribrosa but not to the line of resection T3b Tumor massively invades the choroid T3c Tumor invades the optic nerve through the level of the lamina cribrosa but not to the line of resection and massively invades the choroid T4 Extraocular tumor extension TX Primary tumor cannot be assessed T0 No evidence of primary tumor T1 Tumor confined to the retina,vitreous, or subretinal space. No optic nerve or choroidal invasion. T2 Minimal invasion of the optic nerve and/or optic coats T2a Tumor invades optic nerve up to, but not through, the level of the lamina cribrosa
6TH EDITION (M) CODES	DESCRIPTION: Distant metastasis cannot be assessed CODE: MX DESCRIPTION: No distant metastasis CODE: M0 DESCRIPTION: Distant metastasis CODE: M1 DESCRIPTION: Bone marrow CODE: M1a DESCRIPTION: Other sites CODE: M1b DESCRIPTION: NA CODE: NA
6TH EDITION (M) CODE HELP	Distant Metastasis Pathologic (M) MX Distant metastasis cannot be assessed M0 No distant metastasis M1 Distant metastasis M1a Bone marrow M1b Other sites
7TH EDITION (T) CODES	T-CODE: X T-CODE: 4A T-CODE: 4B T-CODE: 2A T-CODE: 2B T-CODE: 3A T-CODE: 3B
7TH EDITION (T) CODE HELP	Primary Tumor (T) lamina cribrosa and exhibits focal choroidal invasion T3 Tumor with significant optic nerve and/or choroidal invasion T3a Tumor invades optic nerve past lamina cribrosa but not to surgical resection line or tumor exhibits massive choroidal invasion T3b Tumor invades optic nerve past lamina cribrosa but not to surgical resection line and exhibits massive choroidal invasion T4 Tumor invades optic nerve to resection line or exhibits extraocular extension elsewhere T4a Tumor invades optic nerve to resection line but no extraocular extension identified T4b Tumor invades optic nerve to resection line and extraocular extension identified TX Primary tumor cannot be assessed T0 No evidence of primary tumor T1 Tumor confined to eye with no optic nerve or choroidal invasion T2 Tumor with minimal optic nerve and/or choroidal invasion T2a Tumor superficially invades optic nerve head but does not extend past lamina cribrosa or tumor exhibits focal choroidal invasion T2b Tumor superficially invades optic nerve head but does not extend past
7TH EDITION (N) CODES	N-CODE: X
7TH EDITION (N) CODE HELP	Regional Lymph Nodes (N) NX Regional lymph nodes cannot be assessed N0 No regional lymph node involvement N1 Regional lymph node involvement (preauricular, cervical) N2 Distant lymph node involvement
N-CLASS ENCODING	NCA CODE: NX ACOS CODE: NX NRN CODE: N0 ACOS CODE: N0 Regional lymph node metastasis CODE: N1 ACOS CODE: N1 NA CODE: NA ACOS CODE: NA
7TH EDITION (M) CODES	M-CODE: 1A M-CODE: 1B M-CODE: 1C M-CODE: 1D M-CODE: 1E
7TH EDITION (M) CODE HELP	Distant Metastasis (M) M1 Metastasis to sites other than CNS M1a Single lesion M1b Multiple lesions M1c CNS metastasis M1d Discrete mass(es) without leptomeningeal and/or CSF involvement M1e Leptomeningeal and/or CSF involvement
M-CLASS ENCODING	Distant metastasis cannot be assessed CODE: MX ACOS CODE: MX No distant metastasis CODE: M0 ACOS CODE: M0 Distant metastasis CODE: M1 ACOS CODE: M1
5TH EDITION T-CODE HELP	Primary Tumor Pathologic (T) T3a Tumor(s) involve(s) more than 50% of the retina and/or tumor cells in the vitreous T3b Tumor(s) involve(s) optic nerve as far as the lamina cribosa T3c Tumor(s) in anterior chamber and/or invasion with thickening of the uvea and/or intrascleral invasion T4 Tumor with extra-ocular invasion T4a Intraneural tumor beyond the lamina cribosa but not at the line of resection T4b Tumor at the line of resection or other extra-ocular extension TX Primary tumor cannot be assessed T0 No evidence of primary tumor T1 Tumor(s) limited to 25% or less of the retina T2 Tumor(s) involve(s) more than 25% but not more than 50% of the retina T3 Tumor(s) involve(s) more than 50% of the retina and/or invade(s) beyond the retina but remain(s) intra-ocular
5TH EDITION N-CODE HELP	Regional Lymph Nodes Pathologic (N) NX Regional lymph nodes cannot be assessed N0 No regional lymph node metastasis N1 Regional lymph node metastasis

RETINOBLASTOMA (PATH) (41) AJCC STAGING GROUPS (164.33)