Clinical T

This input is used for staging


**Note 1:** Assign T3 If there is fixation of hemilarynx or larynx. **Note 2:** For the following descriptions, assign the appropriate T category (T1, T2 or T3) based on the tumor size. Invasive tumor confined to one of the following subsites Laryngopharynx Postcricoid area Posterior pharyngeal wall Pyriform sinus Tumor invades more than one subsite of hypopharynx WITHOUT fixation of hemilarynx Oropharynx Larynx WITHOUT fixation Confined to hypopharynx Localized, NOS


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
Tumor size (TS) unknown for T categories where TS needed to determine T
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 hypopharynx and/or 2 cm or less in greatest dimension Stated as T1
c2 cT2 Tumor invades more than one subsite of hypopharynx or an adjacent site, OR
Measures more than 2 cm but not more than 4 cm in greatest dimension, WITHOUT fixation of hemilarynx
Stated as T2
c3 cT3 Tumor more than 4 cm in greatest dimension, OR
WITH fixation of hemilarynx or extension to esophagus
Fixation of hemilarynx or larynx

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 any of the following:
Thyroid/cricoid cartilage
Hyoid bone
Thyroid gland
Central compartment soft tissue
Central compartment soft tissues of neck including:
Prelaryngeal strap muscles

Stated as T4a
c4B cT4b Tumor invades:
Prevertebral fascia
Encases carotid artery
Mediastinal structures
Carotid artery (encased)

Base of tongue
Floor of mouth

Further contiguous extension

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)
\* T4 [NOS] is not defined by UICC in the 7th edition. Approval has been provided by UICC to use "Tumor invades bone, nerve or extrinsic deep muscles" as T4 [NOS]. \# T4 [NOS] is not defined in AJCC 7th edition.