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:** 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 4:** "Bony invasion" does not include extension to palate, cribriform plate, or pterygoid plates. Extension to these structures is coded separately.

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 one of the following subsites:
Septum
Floor
Lateral wall, including:
Meatus (superior, middle, inferior)
Nasal conchae (superior, middle, inferior)
Vestibule (edge of naris to mucocutaneous junction)

Confined to mucosa of nasal cavity, NOS

Extension involving mucosa only:
Ethmoid sinus
Choana
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
Involvement of deep tissues of any structure in T3
Involvement of any structure in code T3 WITH bony invasion
Extending to adjacent connective tissue within the nasoethomoidal complex
Anterior orbital contents
Hard palate
Medial wall or floor of the orbit
Nasolacrimal duct
Pterygoid plates
Skin of nose
Skin of cheek

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
Cribriform plate
Clivus
Middle cranial fossa

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)
\* 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]. \# TX, T0 and T4 [NOS] are not defined in AJCC 7th edition.