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:** Skin ulceration does not alter the T category. **Note 3:** In-transit metastasis is coded in N (regional lymph nodes). **Note 4:** Tumor size must be known to assign a value of T1, T2 or T3. 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, T2 or T3 categories, but no size or category is specified, assign TX **Note 5:** For the following descriptions, assign the appropriate T category (T1, T2 or T3) based on the tumor size. Lesion(s) confirmed to dermis Localized, NOS Subcutaneous tissue (through entire dermis)

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

Stated as Tis
c1 cT1 Tumor 2 cm or less in greatest dimension Stated as T1
c2 cT2 Tumor more than 2 cm but not more than 5 cm in greatest
dimension
Stated as T2
c3 cT3 Tumor more than 5 cm in greatest dimension Stated as T3
c4 cT4 Tumor invades deep extradermal structures,
i.e., cartilage, skeletal muscle, fascia, or bone
Fascia

Underlying cartilage, bone, skeletal muscle

Further contiguous extension

Stated as T4
88 88 Not applicable 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)