Clinical T
This input is used for staging
Notes
**Note 1:** Assign 88 for in situ cases (behavior code /2). TNM does not include an in situ category for mucosal melanoma tumors. **Note 2:** Mucosal melanomas are aggressive tumors, therefore, T1 and T2 are omitted, as are Stages I and II. **Note 3:** Assign T3 for localized tumor when no other information is available or for extension involving the mucosa only of adjacent sites. **Note 4:** Assign T4a or T4b for extension involving the deeper tissues of the primary or adjacent sites.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# | |
| c3 | cT3 | Tumor limited to the epithelium and/or submucosa (mucosal disease) | Tumor confined to mucosa of upper lip: Labial mucosa (inner lip) Vermilion surface Extension involving mucosa only: Commissure Floor of mouth Gingiva (lower, upper and NOS) Inner cheek (buccal mucosa) Opposite lip (both lips) Tongue Localized, NOS 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: Deep soft tissue Cartilage Bone Overlying skin |
Involvement of deep soft tissue or musculature of upper lip Soft tissue NOS Involvement of deep soft tissue or musculature of upper lip plus mucosal involvement of any structure in T3 Involvement of deep soft tissue or musculature of any structure in T3 Involvement of deep tissue or periosteum of lower or upper gingiva or floor of mouth of tongue Bone, NOS except base of skull Cartilage, NOS Cartilage of mandible Cartilage of maxilla Cortical bone, NOS Cortical bone of mandible Cortical bone of maxilla Deep tissue or periosteum of lower gingiva Inferior alveolar nerve Mandible, NOS Maxilla, NOS Skin of face/neck Skin of nose Skin of nose plus mucosa or deep tissue lower gingiva Extrinsic muscle of tongue: Genioglossus Hyoglossus Palatoglossus Styloglossus Stated as T4a |
| c4B | cT4b | Tumor invades any of the following: Brain Dura Skull base Lower cranial nerves (IX, X, XI, XII) Masticator space Carotid artery Prevertebral space Mediastinal structures |
Contiguous extension: Base of skull Carotid artery (encased) Pterygoid plates Stated as T4b |
| 88 | 88 | Not applicable | In situ case but no pTis is defined by TNM 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) |