CS Extension

Notes

**Note 1**: Impaired vocal cord mobility, also described as vocal cord paresis, may suggest invasion of intrinsic laryngeal muscle. Fixation of the vocal cord may be described as immobility of the arytenoids noted on endoscopy, vocal cord paralysis, or deviation of larynx to fixed side. **Note 2**: Use code 450 for localized tumor only if no information is available to assign codes 100 through 400. **Note 3**: Use code 130, 375, 530, 775, 810, or 815 if the physician's assignment of T category is the only information available about the extent of the tumor.
Code Description AJCC 7 T AJCC 6 T Summary Stage 1977 T Summary Stage 2000 T
000 In situ, intraepithelial, noninvasive Tis Tis IS IS
100 OBSOLETE DATA CONVERTED V0200
See code 130

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)
ERROR: ERROR: ERROR: ERROR:
110 One vocal cord with normal vocal cord mobility

Stated as T1a with no other information on extension
T1a T1a L L
120 Both vocal cords with normal vocal cord mobility

Stated as T1b with no other information on extension
T1b T1b L L
130 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)

Stated as T1 [NOS] with no other information on extension
T1NOS T1NOS L L
300 Tumor involves adjacent regions(s) of larynx:
Subglottis
Supraglottis:
Aryepiglottic fold
Arytenoid cartilage:
Corniculate tubercle
Cuneiform tubercle
Ventricular bands (false vocal cord(s))
T2 T2 L L
350 Impaired vocal cord mobility T2 T2 L L
375 Stated as T2 with no other information on extension T2 T2 L L
400 Tumor limited to larynx
WITH vocal cord fixation
Involvement of intrinsic muscle(s) of larynx:
Aryepiglottic
Arytenoid
Cricoarytenoid
Cricothyroid
Thyroarytenoid
Thyroepiglottic
Vocalis
T3 T3 L L
450 Localized, NOS T1NOS T1NOS L L
510 Paraglottic space T3 T3 RE RE
520 Inner cortex of thyroid cartilage (minor thyroid cartilage erosion) T3 T3 RE D
530 Stated as T3 with no other information on extension T3 T3 L L
600 Base of tongue
Hypopharynx, NOS
Pre-epiglottic tissues
Postcricoid area
Pyriform sinus
Vallecula
T4a T4a RE RE
610 600 + 520

Any structure in code 600 plus inner cortex of thyroid cartilage
T4a T4a RE D
680 Extension to/through:
Cricoid cartilage
Outer cortex of thyroid cartilage
(See code 520)
T4a T4a RE D
700 Extension to/through tissues beyond larynx:
Strap muscles:
Omohyoid
Sternohyoid
Sternothyroid
Thyrohyoid
Oropharynx
Skin
Soft tissue of neck
Thyroid gland
Trachea
T4a T4a D D
710 Cervical esophagus T4a T4a D D
730 Deep extrinsic muscle(s) of tongue T4a T4a D D
775 Stated as T4a with no other information on extension T4a T4a D D
800 Further contiguous extension, including:
Mediastinal structures
Prevertebral space
Carotid artery (encased)
T4b T4b D D
810 Stated as T4b with no other information on extension T4b T4b D D
815 Stated as T4 [NOS] with no other information on extension T4NOS T4NOS RE RE
950 No evidence of primary tumor T0 T0 U U
999 Unknown; extension not stated
Primary tumor cannot be assessed
Not documented in patient record
TX TX U U