Clinical T
This input is used for staging
Notes
**Note 1:** Involvement of or extension to bone includes any type of tumor extension to the bone, such as erosion, invasion, extension, penetration, or destruction. **Note 2:** Assign T3 for Base of Skull, NOS when there is no information available for more specific bony structures in the skull.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 | No evidence of primary tumor |
| pIS | pTis | Carcinoma in situ | Intraepithelial, noninvasive Stated as Tis |
| c1 | cT1 | Tumor limited to the mucosa with no erosion or destruction of bone | Invasive tumor confined to mucosa of maxillary sinus (antrum) WITHOUT erosion or destruction of bone Localized, NOS Stated as T1 |
| c2 | cT2 | Tumor causing bone erosion or destruction, including extension into: Hard palate Middle nasal meatus EXCEPT extension to posterior wall of maxillary sinus and pterygoid plates |
Tumor causing bone erosion or destruction EXCLUDING extension to: Posterior wall of maxillary sinus (see code 600) Pterygoid plates (see code 680) INCLUDING: Palatine bone, hard palate Middle nasal meatus Nasal cavity (floor, lateral wall, septum, turbinates) Stated as T2 |
| c3 | cT3 | Tumor invades any of the following: Bone of posterior wall of maxillary sinus Subcutaneous tissues Floor or medial wall of orbit Pterygoid fossa Ethmoid sinuses |
Ethmoid sinus, anterior Floor or posterior wall of maxillary sinus Maxilla, NOS Ethmoid sinus, posterior Ethmoid sinus, 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 any of the following: Anterior orbital contents Skin of cheek Pterygoid plates Infratemporal fossa Cribriform plate Sphenoid or frontal sinuses |
Anterior orbital contents Base of skull, NOS Cribriform plate Infratemporal fossa Frontal sinus Pterygoid plates Skin of cheek Sphenoid sinus Stated as T4a |
| c4B | cT4b | Tumor invades any of the following: Orbital apex Dura Brain Middle cranial fossa Cranial nerves other than maxillary division of trigeminal nerve (V2) Nasopharynx Clivus |
Pterygomaxillary fossa Soft palate Temporal fossa 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) |