Clinical T
This input is used for staging
Notes
Note 1: Periosteum is a fibrous membrane that wraps the outer surface of bones. Cortical bone is the dense compact outer layer of the bone. Trabecular, cancellous, or spongy bone (spongiosa) is a porous network of tissue filling the interior of bone, decreasing weight and allowing room for blood vessels and marrow.
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: For the following descriptions, assign the appropriate T category (T1, T2 or T3) based on the tumor size when involvement is limited to the cortical bone.
Invasive tumor confined to
Labial mucosa (inner lip)
Lamina propria
Multiple foci
Submucosa (superficial invasion)
Vermilion surface
Superficial extension to
Skin of lip
Subcutaneous soft tissue of lip
Extension to
Bone, NOS
Buccal mucosa (inner cheek)
Commissure (from lower lip only)
Cortical bone, NOS
Cortical bone of mandible
Cortical bone of maxilla (from commissure only)
Gingiva (lower and NOS)
Mandible, NOS
Maxilla, NOS (from commissure only)
Musculature
Opposite lip (both lips)
Upper gingiva (from commissure only)
Confined to lower lip
Localized, NOS
Note 4: Involvement through cortical bone is required for assignment of T4a.
NAACCR Item
NAACCR #940Clinical 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 | 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 | (lip) Tumor invades through: Cortical bone Floor of mouth Inferior alveolar nerve Skin (chin or nose) (oral cavity) Tumor invades through: Cortical bone Into deep/extrinsic muscle of tongue: Genioglossus Hyoglossus Palatoglossus Styloglossus Maxillary sinus Skin of face |
Trabecular bone of mandible Trabecular bone of maxilla (from commissure only) Floor of mouth Inferior alveolar nerve Nose Skin of face/neck Tongue Stated as T4a |
c4B | cT4b | (lip and oral cavity) Tumor invades: Masticator space Pterygoid plates Skull base or Encases internal carotid artery |
Upper gingiva (from lower lip) Bone of maxilla (from lower lip) Maxilla, NOS (from lower lip) Specified bone (other than mandible, maxilla from commissure) Masticator space Pterygoid plates Further contiguous extension including: Skull base Internal carotid artery (encased) 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.