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)
\* T2 [NOS] is not defined by UICC in the 7th edition. Approval has been provided by UICC to use "Tumor greater than 5 mm and less than or equal to 20 mm, or invasion of tarsal plate, lid margin, or involves full thickness" as T2 [NOS]. \** T3 [NOS] is not defined by UICC in the 7th edition. Approval has been provided by UICC to use "Tumor more than 20 mm or any tumor involving adjacent structures or requiring complete resection" as T3 [NOS]. \# T2 [NOS] is not defined in AJCC 7th edition. \## T3 [NOS] is not defined in AJCC 7th edition.