CS Extension

Notes

**Note 1**: Impaired vocal cord mobility may be described as vocal cord paresis, and may suggest invasion of intrinsic laryngeal muscle. Fixation of the vocal cord may be described as immobility of the arytenoids noted on endoscopy, paralysis of the vocal cords, or deviation of larynx to the 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 685, 735, 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 Invasive tumor confined to:
Supraglottis (one subsite):
Aryepiglottic fold
Arytenoid cartilage
Corniculate cartilage
Cuneiform cartilage
Epilarynx, NOS
False cords:
Ventricular bands
Ventricular cavity
Ventricular fold
Infrahyoid epiglottis
Laryngeal cartilage, NOS
Laryngeal (posterior) surface of epiglottis
Suprahyoid epiglottis (including tip, lingual (anterior) and laryngeal surfaces)
WITH normal vocal cord mobility

Stated as T1 with no further information on extension
T1 T1 L L
200 Tumor involves mucosa of more than one subsite of supraglottis listed in code 100
WITHOUT impaired vocal cord mobility or fixation of larynx or NOS
T2 T2 L L
230 Tumor involves mucosa of glottis
WITHOUT impaired vocal cord mobility or fixation of larynx or NOS
T2 T2 L L
240 Tumor involved adjacent subsites in supraglottis or glottis, NOS, mucosal involvement not specified,
WITHOUT impaired vocal cord mobility or fixation of larynx or NOS
T2 T2 L L
250 Involvement of any structures in supraglottic larynx listed in code 100
and/or glottis
WITH impaired vocal cord mobility
T2 T2 L L
300 OBSOLETE DATA RETAINED V0200
See code 240

Tumor involves adjacent region(s) of larynx
ERROR: T2 L L
320 Tumor involves mucosa of regions outside supraglottis, including:
Base of tongue
Vallecula
Medial wall of pyriform sinus
WITHOUT impaired vocal cord mobility or fixation of larynx or NOS
T2 T2 RE RE
350 OBSOLETE DATA RETAINED V0200
See codes 250 and 360

Impaired vocal cord mobility
T2 T2 L L
360 Involvement of any structures in code 320
WITH impaired vocal cord mobility
T2 T2 RE RE
365 Tumor involves adjacent regions of supraglottis or glottis or region outside supraglottis, NOS, mucosal involvement not specified,
WITHOUT impaired vocal cord mobility or fixation of larynx or NOS
T2 T2 RE RE
375 Stated as T2 with no other information on extension T2 T2 L L
390 Involvement of subglottis
WITHOUT vocal cord fixation
T3 T3 L L
395 390 + 320

Subglottis plus any structure in code 320 WITHOUT vocal cord fixation
T3 T3 RE RE
400 Involvement of any structures in supraglottis (code 100), glottis, and subglottis WITH vocal cord fixation T3 T3 L L
450 Localized, NOS T1 T1 L L
520 Paraglottic space
WITHOUT vocal cord fixation
T3 T3 RE RE
530 520 + 320 T3 T3 RE RE
600 OBSOLETE DATA RETAINED V0200
See code 320

Tumor involves region outside the supraglottis
WITHOUT fixation, including:
Medial wall pyriform sinus
Mucosa of base of tongue
Vallecula
ERROR: T2 RE RE
620 OBSOLETE DATA RETAINED V0200

Code 600 WITH fixation
ERROR: T3 RE RE
625 Involvement of any structures in code 320 and/or 520
WITH vocal cord fixation
T3 T3 RE RE
650 Hypopharynx, NOS
Postcricoid area
Pre-epiglottic tissues
T3 T3 RE RE
660 Deep base of tongue T3 T3 RE RE
670 OBSOLETE DATA CONVERTED V0200
See code 690

Cricoid cartilage
ERROR: ERROR: ERROR: ERROR:
680 Inner cortex of thyroid cartilage (minor erosion) T3 T3 RE D
685 Stated as T3 with no other information on extension T3 T3 RE RE
690 Cricoid cartilage T4a T4a RE RE
695 690 + 680

Cricoid cartilage plus inner cortex of thyroid cartilage
T4a T4a RE D
700 Extension to/through:
Esophagus
Oropharynx
Soft tissues of neck
Outer cortex of thyroid cartilage
Thyroid gland
T4a T4a D D
720 Extension to/through:
Strap muscle(s)
Omohyoid
Sternohyoid
Sternothyroid
Thyrohyoid
Skin
T4a T4a D D
730 Extension to/through:
Deep extrinsic muscle(s) of tongue
Trachea
T4a T4a D D
735 Stated as T4a with no other information on extension T4a T4a RE RE
800 Further contiguous extension, including:
Carotid artery (encased)
Mediastinal structures
Prevertebral space
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