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)