Pathologic 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 #880
Pathologic T Pathologic T Display Description Registrar Notes
pX pTX Primary tumor cannot be assessed Pathologic classification criteria met, evaluation done:
Physician unable to assess T
Surgical resection of primary tumor, extension not stated
Tumor size (TS) unknown for T categories where TS needed to determine T
Physician assigns pTX, no other information available to determine T
p0 pT0 No evidence of primary tumor
pIS pTis Carcinoma in situ Intraepidermal, intraepithelial, noninvasive

Stated as Tis
p1 pT1 Tumor 2 cm or less in greatest dimension Stated as T1
p2 pT2 Tumor more than 2 cm but not more than 5 cm in greatest
dimension
Stated as T2
p3 pT3 Tumor more than 5 cm in greatest dimension Stated as T3
p4 pT4 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 Pathologic classification criteria not met
Pathologic classification criteria met, evaluation done:
Results not documented in patient record
No surgical resection of known primary tumor (not T0)
Resection insufficient for site-specific pathologic assessment
No surgical resection of primary tumor and there isn’t a positive biopsy of a structure in the highest T category and highest N category
Evidence of metastatic disease (pM1), no other workup
Only Pathologic Stage Group documented (no T, N, or M information available)