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 left, right or both ethmoid sinus(es) Confined to mucosa of ethmoid sinus, NOS Extension involving mucosa only of nasal cavity including: Floor Lateral wall Nasal vestibule Nasal cavity, NOS Septum Turbinates Extension to mucosa only of adjacent structures: Frontal sinus Maxillary sinus Nasopharynx Sphenoid sinus 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 |
Extension to deep soft tissue of left, right, or both ethmoid sinus(es) Soft tissue NOS Extension to deep soft tissue of left or right ethmoid sinus or ethmoid sinus, NOS with mucosal involvement of structures in T3 Invasive tumor confined to either left, right, or both ethmoid sinus(es) with bony invasion (Involvement of perpendicular plate of ethmoid bone or ethmoid air cells) Extension to deep tissues of adjacent structures with or without bony invasion: Anterior orbital contents Frontal sinus Hard palate Maxillary sinus Medial wall or floor of orbit Nasopharynx Orbital plate Pterygoid plates Skin of cheek Skin of nose Sphenoid sinus 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 |
Anterior cranial fossa Base of skull Clivus Cribriform plate Middle cranial fossa Further contiguous extension : Carotid artery (encased) 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) |