CS Extension (Glottic Larynx)

Code	Description	TNM Map	SS77 Map	SS2000 Map
00	In situ; noninvasive; intraepithelial	Tis	IS	IS
10	Invasive tumor with normal vocal cord mobility Confined to glottis, NOS; intrinsic larynx; laryngeal commissure(s) anterior, posterior; vocal cord(s), NOS, true vocal cord(s), true cord(s)	T1NOS	L	L
11	One vocal cord	T1a	L	L
12	Both vocal cords	T1b	L	L
30	Tumor involves adjacent regions(s) of larynx Subglottis Supraglottis False vocal cord (s)	T2	L	L
35	Impaired vocal cord mobility	T2	L	L
40	Tumor limited to larynx WITH vocal cord fixation Involvement of intrinsic muscle(s): Aryepiglottic Corniculate tubercle Cuneform tubercule Arytenoid Cricoarytenoid Cricothyroid Thyroepiglottic Thyroarytenoid Vocalis	T3	L	L
45	Localized, NOS	T1NOS	L	L
51	Paraglottic space	T3	RE	RE
52	Minor thyroid cartilage erosion (e.g., inner cortex)	T3	RE	D
60	Base of tongue Hypopharynx, NOS Pre-epiglottic tissues Postcricoid area Pyriform sinus Vallecula	T4a	RE	RE
68	Extension to/through Cricoid cartilage Thyroid cartilage except minor erosion, see code 52	T4a	RE	D
70	Extension to/through tissues beyond larynx: Extrinsic (strap) muscles Omohyoid Sternohyoid Sternothyroid Thyrohyoid Oropharynx Skin Soft tissue of neck Thyroid gland Trachea	T4a	D	D
71	Cervical esophagus	T4a	D	D
73	Deep extrinsic muscle(s) of tongue	T4a	D	D
80	Further contiguous extension, including: Mediastinal structures Prevertebral space Tumor encases carotid artery	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