Clinical T
This input is used for staging
Notes
**Note 1:** The bones of the lateral wall of the nasal cavity include the maxilla, the perpendicular plate of the palatine bone, the medial pterygoid plate, the labyrinth and inferior concha of the ethmoid. The roof of the nasal cavity is formed by the nasal bone. The floor of the nasal cavity, which forms the roof of the mouth, is composed of the bones of the hard palate: the horizontal plate of the palatine bone posteriorly and the palatine process of the maxilla anteriorly. **Note 2:** "Bony invasion" does not include extension to palate, cribriform plate, or pterygoid plates. Extension to these structures is coded separately. **Note 3:** Assign T3 for Base of Skull, NOS when there is no information available for more specific bony structures in the skull. **Note 4:** Minimal extension to anterior cranial fossa implies tumor pushing through the cribriform plate, but without invasion of the dura or brain.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 | |
| 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 ethmoid sinus (left, right or NOS) WITH (involvement of perpendicular plate of ethmoid bone or ethmoid air cells) or WITHOUT bony involvement 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 |
Confined to both ethmoid sinuses WITH or WITHOUT bony involvement Extension to nasal cavity with or without bony invasion (Involvement of perpendicular plate of ethmoid bone or ethmoid air cells): Floor Lateral wall Nasal vestibule Nasal cavity, NOS 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 Frontal sinuses |
Base of skull, NOS Cribriform plate Hard palate Maxillary sinus Medial wall or floor of orbit Orbital plate 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 cranial fossa (minimal extension) Skin of nose 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 |
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) |