Pathologic T

This input is used for staging


**Note 1:** Assign 88 for in situ cases (behavior code /2). TNM does not include an in situ category for GIST peritoneum tumors. **Note 2:** Tumor size must be known to assign a T value. You may use a physician’s statement of the T category if this is the only information in the medical record. If no tumor size is available, assign TX **Note 3:** For the following descriptions, assign the appropriate T based on the tumor size. Tumor confined to site of origin Adjacent connective tissue Adjacent organs/structures including bone/cartilage Confined to peritoneum Confined to retroperitoneum Localized, NOS **For retroperitoneum (C480)** Adrenal(s) (suprarenal gland(s)) Aorta Colon Kidney(s) Pancreas Inferior vena cava (IVC) Vertebra **For peritoneum (C481, C482)** Colon Esophagus Gallbladder Liver Small intestine Spleen Stomach


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
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 but not more than 10 cm in greatest dimension Stated as T3
p4 pT4 Tumor more than 10 cm in greatest dimension Stated as T4
88 88 Not applicable In situ case but no pTis is defined by TNM
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)