Clinical T

This input is used for staging

Notes

**Note 1:** The intrinsic muscles of tongue are four paired muscles within the tongue which control its shape. The extrinsic muscles originate from structures outside the tongue and control its positioning. **Note 2:** Tumor size must be known to assign a value of T1, T2 or T3. You may use a physician’s statement of the T category if this is the only information in the medical record. * If the tumor appears to be in the T1, T2 or T3 categories, but no size or category is specified, assign TX **Note 3:** Assign the appropriate T category (T1-T3) based on the tumor size for the following descriptions Invasive tumor on one side confined to posterior one-third of tongue Lamina propria Submucosa Anterior two-thirds of tongue for base of tongue Base of tongue for lingual tonsil Base of tongue tumor crosses midline Floor of mouth Glossoepiglottic fold Glossopharyngeal fold Lateral pharyngeal wall Lingual tonsil for base of tongue Lower gingiva Midline tumor Musculature, intrinsic or NOS Pharyngoepiglottic fold Soft palate, inferior surface or NOS including uvula Sublingual gland Tonsillar pillars and fossae Tumor of lingual tonsil on both sides Tonsils Vallecula Confined to base of tongue Localized, NOS

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 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 2 cm or less in greatest dimension	Stated as T1
c2	cT2	Tumor more than 2 cm but not more than 4 cm in greatest dimension	Stated as T2
c3	cT3	Tumor more than 4 cm in greatest dimension OR extension to lingual surface of epiglottis	Epiglottis, lingual surface plus soft palate 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: Larynx Deep/extrinsic muscle of tongue, which are: Genioglossus Hyoglossus Palatoglossus Styloglossus Medial pterygoid Hard palate Mandible	Hypopharynx Stated as T4a
c4B	cT4b	Tumor invades any of the following: Lateral pterygoid muscle Pterygoid plates Lateral nasopharynx Skull base Encases carotid artery	Skin 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.