CS Extension

Notes

**Note 1**: Palpebral and tarsal conjunctiva line the eyelid, bulbar conjunctiva covers the eyeball, forniceal conjunctiva covers the space between the eyelid and the globe. According to the AJCC, tumors are most likely to arise at the exposed site where the conjunctival epithelium merges with the corneal epithelium, particularly at the temporal limbus. **Note 2**: Use code 140 or 150 if the physician's assignment of T category is the only information available about the extent of the tumor. **Note 3**: The CS Tumor Size table for this schema is obsolete in CS Version 2, and the collection of tumor size value moved to CS Site-Specific Factor 1, Tumor Size.
Code Description AJCC 7 T AJCC 6 T Summary Stage 1977 T Summary Stage 2000 T
000 In situ, intraepithelial, noninvasive Tis Tis IS IS
100 OBSOLETE DATA RETAINED V0200

Tumor confined to conjunctiva
ERROR: Extension Size Table Csv1 L L
110 Tumor confined to one subsite of conjunctiva:
Bulbar conjunctiva
Tumor confined to one subsite of conjunctiva, NOS
Extension Size Table Csv2 Extension Size Table Csv2 L L
120 Tumor confined to one subsite of conjunctiva:
Forniceal conjunctiva
Palpebral conjunctiva
Tarsal conjunctiva
Extension Size Table Csv2 Extension Size Table Csv2 L L
140 Stated as T1 with no other information on extension Extension Size Table Csv2 Extension Size Table Csv2 L L
150 Stated as T2 with no other information on extension Extension Size Table Csv2 Extension Size Table Csv2 L L
300 OBSOLETE DATA RETAINED V0200

Localized, NOS
ERROR: Extension Size Table Csv1 L L
350 Localized, NOS Extension Size Table Csv2 Extension Size Table Csv2 L L
400 Intraocular extension
Cornea
Intraocular compartments
T3 T3 L L
500 OBSOLETE DATA RETAINED V0200

Adjacent extraocular extension, excluding orbit
Eyelid
ERROR: T3 RE RE
510 Tumor involving more than one subsite of conjunctiva:
Bulbar conjunctiva
Forniceal conjunctiva
Palpebral conjunctiva
Tarsal conjunctiva
Tumor involving more than one subsite of conjunctiva NOS
T3 T3 RE RE
530 Adjacent extraocular extension, excluding orbit:
Anterior eyelid lamella
Caruncle
Eyelid margin
Lacrimal punctum and canaliculi
Plica
Posterior eyelid lamella
T3 T3 RE RE
550 Stated as T3 with no other information on extension T3 T3 RE RE
700 OBSOLETE DATA CONVERTED V0200
See code 730

Orbit, NOS
ERROR: ERROR: ERROR: ERROR:
710 Orbital soft tissues without bone invasion

Stated as T4a with no other information on extension
T4a T4a RE RE
720 Bone of orbit

Stated as T4b with no other information on extension
T4b T4b RE RE
730 Orbit, NOS T4NOS T4NOS RE RE
780 Adjacent paranasal sinuses

Stated as T4c with no other information on extension
T4c T4c RE RE
790 Brain

Stated as T4d with no other information on extension
T4d T4d D D
800 Further contiguous extension T4d T4d D D
810 Stated as T4 [NOS] with no other information on extension T4NOS T4NOS RE RE
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 CS Extension codes 110-150, and 350 ONLY, the T category for AJCC 7 staging is assigned based on the value of CS Site-Specific Factor 1, Tumor Size, as shown in the Extension Size Table CSv2. - For CS Extension codes 110-150, and 350 ONLY, the T category for AJCC 6 staging collected in CSv2 is assigned based on the value of CS Site-Specific Factor 1, Tumor Size, as shown in the Extension Size Table CSv2. - For CS Extension codes 100 and 300 ONLY, the T category for AJCC 6 staging collected in CSv1 is assigned based on the value of CS Tumor Size as shown in the Extension Size Table CSv1.