Collaborative Stage

Note 1: The lacrimal sac is the upper dilated end of the nasolacrimal duct, lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla. The sac connects the lacrimal canaliculi, which drain tears from the eye's surface, and the nasolacrimal duct, which conveys this fluid into the nasal cavity. The most common epithelial tumors of the lacrimal sac are squamous cell and transitional cell carcinomas.
Note 2: Periosteum is a fibrous membrane that wraps the outer surface of bones.
Note 3: AJCC excludes lacrimal sac tumors from 7th Edition staging for the lacrimal gland. Lacrimal sac tumors were not explicitly excluded from AJCC 6th Edition staging.
Note 4: AJCC considers "in situ carcinoma of lacrimal gland" an impossible diagnosis. Cases with extension code 000 are mapped to TX in AJCC staging. Cases with extension code 000 are mapped to in situ in Summary Stage.

* For CS Extension codes 100-405 ONLY, the T category for AJCC 6 staging is assigned based on the value of CS Tumor Size as shown in the Extension Size AJCC 6 Table. . Tumors 2.5 cm or less are T1, and tumors between 2.6 and 5 cm are T2.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	In situ, intraepithelial, noninvasive	NA	TX	IS	IS
100	Tumor confined to lacrimal sac	NA	*	L	L
300	Localized, NOS	NA	*	L	L
400	OBSOLETE DATA RETAINED V0200 See code 405 Invading periosteum of fossa of lacrimal gland/duct	ERROR	*	RE	RE
405	Invading periosteum	NA	*	RE	RE
600	Extension to any of the following WITHOUT bone invasion: Globe (eyeball) Optic nerve Orbital soft tissues	NA	T4	RE	RE
700	Adjacent bone	NA	T4	RE	RE
750	Adjacent structures: Brain Sinus Pterygoid fossa Temporal fossa	NA	T4	D	D
800	Further contiguous extension	NA	T4	D	D
950	No evidence of primary tumor	NA	T0	U	U
999	Unknown; extension not stated Primary tumor cannot be assessed Not documented in patient record	NA	TX	U	U

CS Extension