CS Extension

Notes

**Note 1**: AJCC considers "in situ carcinoma of lacrimal gland" an impossible diagnosis. Any case so coded is mapped to TX for AJCC stage and in situ Summary Stage. **Note 2**: As noted by the AJCC, "As the maximum size of the lacrimal gland is 2 cm, T2 and greater tumors will usually extend into the orbital soft tissue." **Note 3**: Periosteum is a fibrous membrane that wraps the outer surface of bones.
Code Description AJCC 7 T AJCC 6 T Summary Stage 1977 T Summary Stage 2000 T
000 In situ, intraepithelial, noninvasive TX TX IS IS
100 Tumor confined to lacrimal gland Extension Size AJCC7 Extension Size AJCC6 L L
300 Localized, NOS Extension Size AJCC7 Extension Size AJCC6 L L
400 OBSOLETE DATA RETAINED V0200
See code 650

Invading periosteum of fossa of lacrimal gland		 ERROR: T3 RE RE
600 Extension to any of the following WITHOUT bone invasion:
Globe (eyeball)
Optic nerve
Orbital soft tissues		 Extension Size AJCC7 T4 RE RE
610 Stated as T1 with no other information on extension Extension Size AJCC7 Extension Size AJCC6 L L
620 Stated as T2 with no other information on extension Extension Size AJCC7 Extension Size AJCC6 L L
630 Stated as T3 with no other information on extension Extension Size AJCC7 Extension Size AJCC6 L L
650 Invasion of periosteum

Stated as T4a with no other information on extension		 T4a Extension Size AJCC6 RE RE
700 Adjacent periorbital bone

Stated as T4b with no other information on extension		 T4b T4 RE RE
750 Adjacent structures:
Brain
Pterygoid fossa
Sinus
Temporal fossa		 T4c T4 D D
800 Further contiguous extension T4c T4 D D
810 Stated as T4c with no other information on extension T4c T4 D D
815 Stated as T4 [NOS] with no other information on extension T4NOS T4 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 100, 300, and 600-630 ONLY, the T category for AJCC 7 staging is assigned based on the value of CS Tumor Size as shown in the Extension Size AJCC 7 Table. - For CS Extension codes 100, 300, and 610-650 ONLY, the T category for AJCC 6 staging is assigned based on the value of CS Tumor Size as shown in the Extension Size AJCC6 Table.