Collaborative Stage

Note 1: AJCC does not include a Tis or TX category for melanoma of mucosa of head and neck sites. CS Extension codes of 000 and 999 are mapped to NA and AJCC stage group is derived as NA.
Note 2: AJCC does not include a T1 or T2 category for mucosal melanoma of head and neck sites.
Note 3: The bones of the lateral wall of the nasal cavity include the maxilla, the perpendicular plate of the palatine bone, the medial pterygoid plate, the labyrinth and inferior concha of the ethmoid. The roof of the nasal cavity is formed by the nasal bone. The floor of the nasal cavity, which forms the roof of the mouth, is composed of the bones of the hard palate: the horizontal plate of the palatine bone posteriorly and the palatine process of the maxilla anteriorly.
Note 4: "Bony invasion" does not include extension to palate, cribriform plate, or pterygoid plates. Extension to these structures is coded separately.
Note 5: Use codes 330 and 340 for extension involving the mucosa only of adjacent sites. Use higher codes for extension involving the deeper tissues of the primary or adjacent sites.
Note 6: Use code 300 for localized tumor only if no information is available to assign code 105, 110, 200, 350, or 380.
Note 7: Use code 350, 725, 810, or 815 if the physician's assignment of T category is the only information available about the extent of the tumor.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	In situ, intraepithelial, noninvasive	NA	NA	IS	IS
100	OBSOLETE DATA RETAINED V0200 Invasive tumor confined to site of origin Meatus (superior, middle, inferior) Nasal chonchae (superior, middle, inferior) Septum Tympanic membrane	ERROR	NA	L	L
105	Tumor confined to mucosa of one of the following subsites: Septum Floor Lateral wall, including: Meatus (superior, middle, inferior) Nasal conchae (superior, middle, inferior) Vestibule (edge of naris to mucocutaneous junction)	T3	NA	L	L
110	Confined to mucosa of nasal cavity, NOS	T3	NA	L	L
200	Tumor confined to mucosa of two or more subsites listed in code 105	T3	NA	L	L
300	Localized, NOS	T3	NA	L	L
330	Extension involving mucosa only: Ethmoid sinus Choana Frontal sinus Nasopharynx	T3	NA	RE	RE
340	Extension involving mucosa only: Maxillary sinus Sphenoid sinus	T3	NA	D	D
350	Stated as T3 with no other information on extension	T3	NA	L	L
380	Involvement of deep tissues of any structure in code 105 or 110	T4a	NA	L	L
385	380 + 330 Involvement of deep tissues of any structure in code 105 or 110 plus mucosal involvement of any structure in code 330	T4a	NA	RE	RE
390	Involvement of any structure in code 105, 110 WITH bony invasion	T4a	NA	RE	RE
400	Extending to adjacent connective tissue within the nasoethomoidal complex Nasolacrimal duct	T4a	NA	RE	RE
450	Hard palate	T4a	NA	RE	RE
490	(385 - 450) + 340 Involvement of any structure in codes 385 - 450 plus mucosal involvement of any structure in code 340	T4a	NA	D	D
500	Involvement of deep tissues or bony involvement of any structure in code 340	T4a	NA	D	D
600	OBSOLETE DATA REVIEWED AND CHANGED V0203 Extension to frontal sinus and extension to nasopharynx were each included in two codes in CSv1. All structures in code 600 should be reviewed and recoded to 610 or 690 as appropriate. Adjacent organs/structures including: Bone of skull Choana Frontal sinus Hard palate Nasopharynx	ERROR	ERROR	ERROR	ERROR
610	OBSOLETE DATA RETAINED V0203 Adjacent organs/structures including: Bone of skull Choana Frontal sinus Hard palate	ERROR	NA	RE	RE
650	OBSOLETE DATA CONVERTED V0200 See code 750 Cribiform plate	ERROR	ERROR	ERROR	ERROR
660	OBSOLETE DATA RETAINED V0200 Maxillary sinus	ERROR	NA	RE	RE
670	Medial wall or floor of the orbit	T4a	NA	D	D
690	OBSOLETE DATA RETAINED V0203 Nasopharynx	ERROR	NA	RE	RE
700	OBSOLETE DATA REVIEWED AND CHANGED V0203 Frontal sinus included in codes 600 and 700 in CSv1. Review and recode involvement of frontal sinus to code 610, other structures to code 705. Tumor invades: Anterior orbital contents Skin of nose Skin of cheek Minimal extension to: Anterior cranial fossa Pterygoid plates Sphenoid or frontal sinuses	ERROR	ERROR	ERROR	ERROR
705	OBSOLETE DATA RETAINED V0203 Anterior orbital contents Skin of nose Skin of cheek Anterior cranial fossa (minimal extension) Pterygoid plates Sphenoid sinus	ERROR	NA	D	D
710	OBSOLETE DATA REVIEWED AND CHANGED V0203 Nasopharynx included in codes 600 and 710 in CSv1. Review and recode involvement of nasopharynx to code 690, other structures to code 750 or 795 Tumor invades: Orbital apex Dura Brain Middle cranial fossa Cranial nerves other than (V2), nasopharynx, or clivus	ERROR	ERROR	ERROR	ERROR
715	Anterior orbital contents Skin of nose Skin of cheek Pterygoid plates	T4a	NA	D	D
725	Stated as T4a with no other information on extension	T4a	NA	L	L
750	Anterior cranial fossa Base of skull Cribriform plate Clivus Middle cranial fossa	T4b	NA	RE	RE
760	750 + (340, 500, 670, or 705) Involvement of structures in code 750 plus mucosal or deep involvement of structures in code 340 or involvement of structures in code 670 or 705	T4b	NA	D	D
795	Contiguous extension including: Brain Dura Lower cranial nerves (IX, X, XI, XII)	T4b	NA	D	D
800	OBSOLETE DATA REVIEWED AND CHANGED V0203 Middle cranial fossa included in codes 750 and 800 in CSv2:V0201, V0202. Review and recode involvement of middle cranial fossa to code 750 or 760, other structures to code 795. Contiguous extension including: Brain Dura Lower cranial nerves (IX, X, XI, XII) Middle cranial fossa Orbital apex	ERROR	ERROR	ERROR	ERROR
801	Further contiguous extension including: Carotid artery (encased) Masticator space Mediastinal structures Prevertebral space	T4b	NA	D	D
810	Stated as T4b with no other information on extension	T4b	NA	D	D
815	Stated as T4 [NOS] with no other information on extension	T4NOS	NA	L	L
950	OBSOLETE DATA RETAINED V0200 No evidence of primary tumor	ERROR	NA	U	U
999	Unknown; extension not stated Primary tumor cannot be assessed Not documented in patient record	NA	NA	U	U

MelanomaNasalCavity

CS Extension