Clinical 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.


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 2 cm or less in greatest dimension
WITH less than two-high risk features
Stated as T1
c2 cT2 Tumor more than 2 cm in greatest dimension OR
WITH two or more high-risk features
Stated as T2
c4 cT4 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 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)