CS Extension

This input is used for staging

Notes

**Note 1**: For correct calculation of derived staging fields for this schema, CS Extension and CS Site-Specific Factor 1, Extension Evaluated at Enucleation, must both be coded, whether or not an enucleation was performed. Information from enucleation is excluded from CS Extension and coded only in CS Site-Specific Factor 1. **Note 2**: If both eyes are involved, code the information for the most extensively involved eye in this field, and code the information for the second eye in CS Site-Specific Factor 6. **Note 3**: The mapping values for AJCC T, SS77, and SS2000 and the associated c, p, y, or a indicator (staging basis) are assigned based on the values in CS Extension (clinical extension), CS Tumor Size/Ext Eval, and CS Site-Specific Factor 1 - Extension Evaluated at Enucleation. Pathologic staging information from an enucleation always takes precedence over clinical staging, except in cases with neoadjuvant treatment where clinical disease is as extensive as or more extensive than disease at surgery.

Default

999

NAACCR Item

NAACCR #2810
Code Description AJCC 7 T AJCC 6 T Summary Stage 1977 T Summary Stage 2000 T
110 OBSOLETE DATA RETAINED V0200

Any eye in which the largest tumor is less than or
equal to 3 mm in height
AND
no tumor is located closer than 1 DD (1.5mm) to the optic nerve or fovea
ERROR: T1a L L
120 Volume no more than two-thirds of eye
AND
Largest dimension not greater than 3 millimeter (mm)
AND
Location not closer than 1.5 mm to optic nerve or fovea
AND
Tumor formation: No vitreous or subretinal seeding and no subretinal fluid beyond 5 mm from base of tumor
AND
Retinal detachment not present

Stated as T1a with no other information on extension
T1a T1a L L
130 OBSOLETE DATA RETAINED V0200

All other eyes in which the tumor(s) are confined to retina
regardless of location or size (up to half the volume of the eye)
AND No vitreous seeding
AND No retinal detachment or subretinal fluid greater than 5 mm from
the base of the tumor
ERROR: T1b L L
140 Volume no more than two-thirds of eye
AND
(Largest dimension greater than 3 mm
OR location closer than 1.5 mm to optic nerve or fovea)
AND
Tumor formation: No vitreous or subretinal seeding and no subretinal fluid beyond 5mm from base of tumor
AND
Retinal detachment not present

Stated as T1b with no other information on extension
T1b T1b L L
160 Volume no more than two-thirds of eye
AND
(Largest dimension greater than 3 mm
OR location closer than 1.5 mm to optic nerve or fovea)
AND
(Tumor formation: Subretinal fluid beyond 5 mm from base of tumor
OR retinal detachment present)

Stated as T1c with no other information on extension
T1c T2a L L
180 Volume no more than two-thirds of eye
AND
Tumor formation: No vitreous or subretinal seeding

Stated as T1 [NOS] with no other information on extension
T1NOS T1NOS L L
310 OBSOLETE DATA RETAINED V0200

Tumor confined to retina (no vitreous seeding or significant retinal detachment), NOS
ERROR: T1NOS L L
410 OBSOLETE DATA RETAINED V0200

Minimal tumor spread to vitreous and/or subretinal space.
Fine local or diffuse vitreous seeding and/or serous retinal
detachment up to total detachment may be present but no clumps,
lumps, snowballs, or avascular masses are allowed
in the vitreous or subretinal space.
Calcium flecks in the vitreous or subretinal space are allowed.
Tumor may fill up to 2/3 the volume of the eye.
ERROR: T2a L L
420 Volume no more than two-thirds of eye
AND
Tumor formation : Focal vitreous and/or subretinal seeding of fine aggregates of tumor cells but no large clumps or "snowballs" of tumor cells
AND
Retinal detachment may be present

Stated as T2a with no other information on extension
T2a T2a L L
430 OBSOLETE DATA RETAINED V0200

Massive tumor spread to vitreous and/or subretinal space.
Vitreous seeding and/or subretinal implantation may consist of
lumps, clumps, snowballs, or avascular tumor masses.
Retinal detachment may be total.
Tumor may fill up to 2/3 the volume of the eye.
ERROR: T2b L L
440 Volume no more than two-thirds of eye
AND
Tumor formation: Massive vitreous and/or subretinal seeding defined as diffuse clumps or "snowballs" of tumor cells
AND
Retinal detachment may be present

Stated as T2b with no other information on extension
T2b T2b L L
450 OBSOLETE DATA RETAINED V0200
Extension reassigned to codes 500, 520

Unsalvageable intraocular disease.
Tumor fills more than 2/3 the eye
No possibility of visual rehabilitation.

One or more of the following are present:
Tumor-associated glaucoma, either neovascular or angle closure
Anterior segment extension of tumor
Ciliary body extension of tumor
Hyphema (significant)
Massive vitreous hemorrhage
Tumor in contact with lens
Orbital cellulitis-like clinical presentation
ERROR: T2c VALUE:L VALUE:L
460 Volume no more than two-thirds of eye
AND
Tumor formation: Vitreous and/or subretinal seeding
AND
Retinal detachment may be present

Stated as T2 [NOS] with no other information on extension
T2NOS T2NOS L L
470 OBSOLETE DATA RETAINED V0200

Tumor with contiguous spread to adjacent tissues
or spaces (vitreous or subretinal space), NOS
ERROR: T2NOS VALUE:L VALUE:L
500 Severe intraocular disease:
Tumor occupies more than two-thirds volume of eye

Stated as T3a with no other information on extension
T3a T2c L L
520 Severe intraocular disease:
One or more complications present including:
Tumor-associated neovascular or angle closure glaucoma
Tumor extension into anterior segment
Hyphema (blood in anterior chamber)
Vitreous hemorrhage
Orbital cellulitis

Stated as T3b with no other information on extension
T3b T2c L L
540 Severe intraocular disease NOS

Stated as T3 [NOS] with no other information on extension
T3NOS T2c L L
590 OBSOLETE DATA RETAINED V0200

Invasion of optic nerve and/or optic coats, NOS
ERROR: T3 RE RE
680 Extraocular disease detected by imaging studies:
Invasion of optic nerve

Stated as T4a with no other information on extension
T4a T3 RE RE
700 Extraocular disease detected by imaging studies:
Invasion into orbit

Stated as T4b with no other information on extension
T4b T4 RE RE
720 Extraocular disease detected by imaging studies:
Intracranial extension not past optic chiasm

Stated as T4c with on other information on extension
T4c T4 D D
740 Extraocular disease detected by imaging studies:
Intracranial extension past optic chiasm

Stated as T4d with no other information on extension
T4d T4 D D
750 OBSOLETE DATA RETAINED V0200

Extraocular tumor
ERROR: T4 RE RE
760 Extraocular disease detected by imaging studies NOS

Stated as T4 [NOS]
T4NOS T4 RE RE
800 OBSOLETE DATA RETAINED V0200

Further contiguous extension
ERROR: T4 D D
950 No evidence of primary tumor T0 T0 U U
999 Unknown; extension not stated
Primary tumor cannot be assessed
Not documented in patient record
TX TX U U
For this site, extension is coded in two CS Fields: CS Extension (clinical extension) and CS Site-Specific Factor 1 - Extension Evaluated at Enucleation. The mapping values for the T category for AJCC stage, SS77, and SS2000 and the associated c, p, y, or a indicator are assigned based on the values in CS Extension, CS Tumor Size/Ext Eval, and CS Site-Specific Factor 1 as shown in the Special Calculation Table for AJCC T and Special Calculation Table for SEER Summary Stage.