Pathologic T

This input is used for staging


**Note 1:** T1 for cutaneous squamous cell carcinomas with one or no high-risk features is based on tumor size. * If there are no high risk features and tumor size is unknown, assign TX **Note 2:** T1 and T2 categories are based on size and high risk features and not depth of invasion or extension. * TNM includes a T3 category for head and neck skin primaries only **Note 3:** 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 and there are no known high risk features, assign TX **Note 4:** Assign the appropriate T category (T1, T2) based on the tumor size for the following descriptions Adjacent connective tissue excluding skeletal muscle Confined to scrotum Skeletal muscle Subcutaneous tissue Underlying cartilage Adjacent organs/structures Male genital organs Epididymis Penis Prostate Spermatic cord Testis Further contiguous extension Other organs and structures in male pelvis Bladder Rectum Urethra Confined to scrotum, NOS Localized, NOS **Note 5:** In the case of multiple simultaneous tumors, code the tumor with the greatest extension. **Note 6:** Skin ulceration does not alter the T category.


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
Bowen disease
p1 pT1 Tumor 2 cm or less in greatest dimension
WITH less than two-high risk features
Stated as T1
p2 pT2 Tumor more than 2 cm in greatest dimension OR
WITH two or more high-risk features
Stated as T2
p4 pT4 Tumor with direct or perineural invasion of skull base or axial skeleton Bone:
Axial or appendicular skeleton

Stated as T4
88 88 Not applicable Primary site/histology not TNM defined
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)