Collaborative Stage

Note 1: AJCC does not include a Tis or TX category for melanoma of mucosa of head and neck sites. Extension codes of 000 and 999 will be mapped to NA and AJCC stage group will be 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: Code Base of skull NOS only if no information is available to code to more specific bony structures in the skull.
Note 6: Use code 300 for localized tumor ONLY if no information is available to assign code 105, 110, 200, or 350.
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; non-invasive	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 mucosal of one of the following subsites: Septum Floor Lateral wall, including meatus (superior, middle, inferior) and nasal conchae (superior, middle, inferior) Vestibule (edge of naris to mucocutaneous junction) Without bony invasion	T3	NA	L	L
110	Confined to mucosa of nasal cavity NOS without bony invasion	T3	NA	L	L
200	Tumor confined to mucosa of two or more subsites listed in code 105 WITHOUT bony invasion	T3	NA	L	L
300	Localized, NOS	T3	NA	L	L
330	Extension to mucosa of adjacent regions: Ethmoid sinus Choana Frontal sinus Nasopharynx Without bony invasion	T3	NA	RE	RE
340	Extending to mucosa of further adjacent regions Maxillary sinus Sphenoid sinus WITHOUT bony invasion	T3	NA	D	D
350	Stated as T3 NOS with no otherinformation on extension	T3	NA	L	L
380	Involvement of deep tissues of any structure in code 105, 110, or 200	T4a	NA	L	L
385	380 + 330 (Involvement of deep tissues of any structure in code 105, 110, or 200 + Mucosal involvement of any structure in code 330	T4a	NA	RE	RE
390	Involvement of any structure in code 105, 110, or 200 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, 390, 400, or 450) + 340 (Involvement of any structure in code 385, 390, 400, or 450 + 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 RETAINED V0200 Adjacent organs/structures including: Bone of skull Choana Frontal sinus Hard palate Nasopharynx	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
700	OBSOLETE DATA RETAINED V0200 Tumor invades: Anterior orbital contents Skin of nose Skin of cheek Minimal extension to: Anterior cranial fossa Pterygoid plates Sphenoid or frontal sinuses	ERROR	NA	D	D
705	Tumor invades Anterior orbital contents Skin of nose Skin of cheek Pterygoid plates	T4a	NA	D	D
710	OBSOLETE DATA RETAINED V0200 Tumor invades Orbital apex Dura Brain Middle cranial fossa Cranial nerves other than (V2),nasopharynx, or clivus	ERROR	NA	D	D
725	Stated as T4a with no other information on extension	T4a	NA	L	L
750	Anterior cranial fossa Cribriform plate Clivus Middle cranial fossa Skull base	T4b	NA	RE	RE
760	750 + (705, 670, 340, or 500) (Involvement of structures in code 750 + Involvement of structures in code 705 or 670 or any involvement of structures in code 340)	T4b	NA	D	D
800	Contiguous extension including Orbital apex Dura Brain Middle cranial fossa Cranial nerves (IX, X, XI, XII)	T4b	NA	D	D
801	Further contiguous extension including Masticator space Carotid artery (encased) Prevertebral space Mediastinal structures	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 Primary tumor cannot be assessed Not documented in patient record	NA	NA	U	U

MelanomaNasalCavity

CS Extension