Clinical T
This input is used for staging
Notes
**Note:** 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 **Site-Specific Factor 6, Clinical Extension for Second Eye**.NAACCR Item
NAACCR #940| Clinical T | Clinical T Display | Description | Registrar Notes |
|---|---|---|---|
| cX | cTX | Primary tumor cannot be assessed | Clinical classification criteria met, evaluation done: Physician unable to assess T Extension cannot be determined Physician assigns cTX, no other information available to determine T |
| c0 | cT0 | No evidence of primary tumor | |
| c1 | cT1 | Tumor no more than two-thirds the volume of the eye with no vitreous or subretinal seeding | Note: T1 has subcategories of T1a, T1b and T1c. Assign T1 only when there is no information available to assign one of the subcategories Volume no more than two-thirds of eye AND Tumor formation: No vitreous or subretinal seeding Stated as T1 [NOS] |
| c1A | cT1a | No tumor in either eye is greater than 3 mm in largest dimension or located closer than 1.5 mm to optic nerve or fovea | 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 |
| c1B | cT1b | At least one tumor is greater than 3 mm in largest dimension or located closer than 1.5 mm to optic nerve or fovea No retinal detachment or subretinal fluid beyond 5 mm from the base of the tumor |
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 |
| c1C | cT1c | At least one tumor greater than 3 mm in largest dimension or located closer than 1.5 mm to the optic nerve or fovea WITH retinal detachment or subretinal fluid beyond 5 mm from the base of the tumor |
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 |
| c2 | cT2 | Tumors no more than two-thirds the volume of the eye, or with vitreous or subretinal seeding WITH retinal detachment |
Note: T2 has subcategories of T2a and T2b. Assign T2 only when there is no information available to assign one of the subcategories 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] |
| c2A | cT2a | Tumor with focal vitreous and/or subretinal seeding of fine aggregates of tumor cells, NO large clumps or 'snowballs' of tumor cells |
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 |
| c2B | cT2b | Tumor with massive vitreous and/or subretinal seeding, Defined as diffuse clumps or 'snowballs' of tumor cells |
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 |
| c3 | cT3 | Severe intraocular disease | Note: T3 has subcategories of T3a and T3b. Assign T3 only when there is no information available to assign one of the subcategories Stated as T3 [NOS] |
| c3A | cT3a | Tumor fills more than two-thirds of the eye | Stated as T3a |
| c3B | cT3b | One or more complications present, which may include: Tumor-associated neovascular or angle closure glaucoma Tumor extension into the anterior segment Hyphema Vitreous hemorrhage Orbital cellulitis |
Stated as T3b |
| c4 | cT4 | Extraocular tumor | Note: T4 has subcategories of T4a, T4b, T4c and T4d. Assign T4 only when there is no information available to assign one of the subcategories Extraocular disease detected by imaging studies NOS Stated as T4 [NOS] |
| c4A | cT4a | Invasion of optic nerve | Extraocular disease detected by imaging studies: Stated as T4a |
| c4B | cT4b | Invasion into orbit | Extraocular disease detected by imaging studies: Stated as T4b |
| c4C | cT4c | Intracranial extension not past chiasm | Extraocular disease detected by imaging studies: Stated as T4c |
| c4D | cT4d | Intracranial extension past chiasm | Extraocular disease detected by imaging studies: Stated as T4d |
| 88 | 88 | Not applicable | Primary site/histology not TNM defined Death certificate only (DCO) case |
| <BLANK> | BLANK | See Registrar Notes | Clinical classification criteria not met Clinical classification criteria met, evaluation done: No information about diagnostic workup Results not documented in record Clinical evaluation of primary tumor not done or unknown if done Tumor first detected on surgical resection (no clinical workup) Evidence of metastatic disease [(cM1) or (pM1)], no other workup Only Clinical Stage Group documented (no T, N, or M information available) |