Clinical T
This input is used for staging
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:** Assign T1 for localized tumor only if no information is available to identify further extension.NAACCR Item
NAACCR #940| Clinical T | Clinical T Display | Description | Registrar Notes |
|---|---|---|---|
| cX | cTX | Primary tumor cannot be assessed | Clinical classification criteria met, evaluation done: Physician unable to assess T Extension cannot be determined Physician assigns cTX, no other information available to determine T |
| c0 | cT0 | No evidence of primary tumor | |
| pIS | pTis | Carcinoma in situ | Intraepithelial, noninvasive Stated as Tis |
| c1 | cT1 | Tumor limited to one subsite of supraglottis WITH normal vocal cord mobility |
Invasive tumor confined to anterior surface of epiglottis with normal vocal cord mobility Localized, NOS Stated as T1 |
| c2 | cT2 | Tumor invades: Mucosa of more than one adjacent subsite of supraglottis OR Glottis or region outside the supraglottis, e.g., Mucosa of base of tongue Vallecula Medial wall of pyriform sinus WITHOUT fixation of the larynx |
Mucosa of adjacent subsite(s) of oropharynx Mucosa of vallecula without fixation of larynx Mucosa of adjacent subsite(s) of supraglottis (including posterior surface of epiglottis) WITHOUT fixation of larynx Larynx, glottic or NOS WITHOUT fixation of larynx Mucosa of pyriform sinus, medial wall or NOS WITHOUT fixation of larynx Mucosa of base of tongue WITHOUT fixation of larynx Stated as T2 |
| c3 | cT3 | Tumor limited to larynx WITH vocal cord fixation and/or invades any of the following: Postcricoid area Pre-epiglottic space Paraglottic space Inner cortex of thyroid cartilage |
Any structure coded in T1 or T2 WITH vocal cord fixation Hypopharynx, NOS Inner cortex of thyroid cartilage (minor erosion) Paraglottic space Pre-epiglottic tissues Postcricoid area Pyriform sinus except medial wall Stated as T3 |
| c4 | cT4 | Not defined by UICC*# | Note: T4 has subcategories of T4a and T4b. Assign T4 only when there is no information available to assign one of the subcategories Tumor invades bone, nerve or extrinsic deep muscles Stated as T4[NOS] |
| c4A | cT4a | Tumor invades through the thyroid cartilage and/or invades tissues beyond the larynx, e.g., Trachea Soft tissues of neck including deep/extrinsic muscle of tongue Genioglossus Hyoglossus Palatoglossus Styloglossus Strap muscles Thyroid Esophagus |
Soft palate, inferior surface including uvula Soft palate, superior (nasopharyngeal) surface Soft palate, NOS Nasopharynx, NOS Deep tissues of base of tongue Buccal mucosa (inner cheek) Floor of mouth Gum (gingiva) Pterygoid muscle Soft tissues of neck Trachea Thyroid Invasion of, through outer cortex of thyroid cartilage Thyroid cartilage, NOS Strap muscles: Omohyoid Sternohyoid Thyrohyoid Stated as T4a |
| c4B | cT4b | Tumor invades: Prevertebral space Encases carotid artery Mediastinal structures |
Prevertebral fascia or muscle Further contiguous extension, including: Anterior 2/3 of tongue Bone Hard palate Mandible Parotid gland Stated as T4b |
| 88 | 88 | Not applicable | Primary site/histology not TNM defined Death certificate only (DCO) case |
| <BLANK> | BLANK | See Registrar Notes | Clinical classification criteria not met Clinical classification criteria met, evaluation done: No information about diagnostic workup Results not documented in record Clinical evaluation of primary tumor not done or unknown if done Tumor first detected on surgical resection (no clinical workup) Evidence of metastatic disease [(cM1) or (pM1)], no other workup Only Clinical Stage Group documented (no T, N, or M information available) |