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 NET ampulla tumors. **Note 2:** 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, assign TX **Note 3:** Assign the appropriate T category (T1, T2) based on the tumor size for the following descriptions Invasive tumor confined/limited to ampulla of Vater or extending to sphincter of Oddi Duodenal wall Confined to ampulla, NOS Localized, NOS


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 invades lamina propria or submucosa and is no greater than 1 cm in size Stated as T1
p2 pT2 Tumor invades muscularis propria or is greater than 1 cm in size Stated as T2
p3 pT3 Jejunal or ileal tumor invades subserosa
Ampullary or duodenal tumor invades pancreas or retroperitoneum
Peripancreatic soft tissues

Stated as T3
p4 pT4 Tumor perforates visceral peritoneum (serosa) or invades other organs or adjacent structures Common bile duct
Extrahepatic bile ducts other than common bile duct or sphincter of Oddi

Extension to other adjacent organs or tissues:
Blood vessels (major):
Hepatic artery
Portal vein
Hepatic flexure
Lesser omentum
Liver including porta hepatis
Transverse colon

Further contiguous extension

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)