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 |