CS Extension: Anterior 2/3 of Tongue, Tip, Border, & Tongue, NOS

Code	Description	TNM	SS77	SS2000
00	In situ; noninvasive; intraepithelial	Tis	IS	IS
10	Invasive tumor on one side confined to: Lamina propria Submucosa	*	L	L
20	Musculature, intrinsic or NOS	*	L	L
30	Localized, NOS Midline tumor	*	L	L
40	Tumor crosses midline	*	L	L
50	Base of tongue Floor of mouth Gingiva, lower Retromolar trigone	*	RE	RE
53	Sublingual gland	*	RE	RE
60	Lateral pharyngeal wall Soft palate, inferior surface Tonsillar pillars and fossae Tonsils	*	D	RE
70	Mandible	T4a	RE	D
72	(60) + (70)	T4a	D	D
74	Maxilla Maxillary sinus	T4a	D	D
75	Musculature, extrinsic: Genioglossus Geniohyoid Hyoglossus Mylohyoid Palatoglossus Styloglossus	T4a	D	D
80	Further contiguous extension	T4b	D	D
95	No evidence of primary tumor	T0	U	U
99	Unknown extension Primary tumor cannot be assessed Not documented in patient record	TX	U	U

*For codes 10, 20, 30, 40, 50, 53, and 60 ONLY, the T category is assigned based on the value of CS Tumor Size, as shown in the Extension Size Table for this site.