Clinical T
This input is used for staging
Notes
**Note 1:** Code the tumor with the greatest extension when there are multiple simultaneous tumors. **Note 2:** Tumor size must be known to assign a value of T1 or T2. You may use a physician’s statement of the T category if this is the only information in the medical record. * If the tumor appears to be in the T1 or T2 categories, but no size or category is specified, assign TX **Note 3:** Assign the appropriate T category (T1, T2) based on the tumor size for the following descriptions Lesion(s) confined to dermis Minimal infiltration of dermis (Not invading tarsal plate, not at eyelid margin) Subcutaneous tissue (Through entire dermis, not invading tarsal plate, not at eyelid margin) Tumor invades tarsal plate, not at eyelid margin Tumor at eyelid margin Tumor involves full eyelid thickness Localized, NOS **Note 4:** Skin ulceration does not alter the T category. **Note 5:** Presence of tumor at eyelid margin takes priority over depth of invasion in dermis/tarsal plate. **Note 6:** Code metastatic skin lesions in M (distant metastasis).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 Tumor size (TS) unknown for T categories where TS needed to determine T Physician assigns cTX, no other information available to determine T |
| c0 | cT0 | No evidence of primary tumor | |
| pIS | pTis | Carcinoma in situ | Intraepidermal, intraepithelial, noninvasive Bowen disease |
| c1 | cT1 | Tumor 5 mm or less in greatest dimension NOT invading the tarsal plate or eyelid margin |
Stated as T1 |
| c2 | cT2 | Not defined by UICC*# | Note: T2 has subcategories of T2a and T2b. Assign T2 only when there is no information available to assign one of the subcategories Tumor greater than 5 mm and less than or equal to 20 mm, or invasion of tarsal plate, lid margin, or involves full thickness Stated as T2[NOS] |
| c2A | cT2a | Tumor more than 5 mm, but not more than 10 mm in greatest dimension OR Any tumor that invades the tarsal plate or eyelid margin |
Stated as T2a |
| c2B | cT2b | Tumor more than 10 mm, but not more than 20 mm in greatest dimension, OR Involves full thickness eyelid |
Stated as T2b |
| c3 | cT3 | Not defined by UICC**## | Note: T3 has subcategories of T3a and T3b. Assign T3 only when there is no information available to assign one of the subcategories Tumor more than 20 mm or any tumor involving adjacent structures or requiring complete resection Stated as T3[NOS] |
| c3A | cT3a | Tumor more than 20 mm in greatest dimension OR Any tumor that invades: Adjacent ocular Orbital structures Any tumor with perineural invasion |
Adjacent structures, including: Bulbar conjunctiva Globe Sclera Soft tissues of orbit Bone/periosteum of orbit Skeletal muscle Underlying cartilage Stated as T3a |
| c3B | cT3b | Tumor whose complete resection requires: Enucleation, exenteration, or bone resection |
Stated as T3b |
| c4 | cT4 | Tumor is not resectable due to extensive invasion of: Ocular Orbital Craniofacial structures Brain |
Tumor unresectable, extensive invasion: Ocular structures Orbital structures Central nervous system Nasal cavity Other craniofacial structures Paranasal sinuses Further contiguous extension Stated as T4 |
| 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) |