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 vocal cord(s) (may involve anterior or posterior commissure) WITH normal mobility |
Note: T1 has subcategories of T1a and T1b. Assign T1 only when there is no information available to assign one of the subcategories 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) Localized, NOS Stated as T1 [NOS] |
| c1A | cT1a | Tumor limited to one vocal cord | One vocal cord with normal vocal cord mobility Stated as T1a with no other information on extension |
| c1B | cT1b | Tumor involves both vocal cords | Both vocal cords with normal vocal cord mobility Stated as T1b with no other information on extension |
| c2 | cT2 | Tumor extends to supraglottis and/or subglottis, and/or WITH impaired vocal cord mobility |
Tumor involves adjacent regions(s) of larynx: Subglottis Supraglottis: Aryepiglottic fold Arytenoid cartilage: Corniculate tubercle Cuneiform tubercle Ventricular bands (false vocal cord(s)) Impaired vocal cord mobility Stated as T2 |
| c3 | cT3 | Tumor limited to larynx WITH vocal cord fixation and/or Invades: Paraglottic space Inner cortex of the thyroid cartilage |
Tumor limited to larynx WITH vocal cord fixation Involvement of intrinsic muscle(s) of larynx: Aryepiglottic Arytenoid Cricoarytenoid Cricothyroid Thyroarytenoid Thyroepiglottic Vocalis Inner cortex of thyroid cartilage (minor thyroid cartilage erosion) 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 outer cortex of 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 |
Base of tongue Hypopharynx, NOS Pre-epiglottic tissues Postcricoid area Pyriform sinus Vallecula Extension to/through: Cricoid cartilage Outer cortex of thyroid cartilage Extension to/through tissues beyond larynx: Strap muscles: Omohyoid Sternohyoid Sternothyroid Thyrohyoid Oropharynx Skin Soft tissue of neck Thyroid gland Trachea Cervical esophagus Stated as T4a |
| c4B | cT4b | Tumor invades: Prevertebral space Encases carotid artery Mediastinal structures |
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) |