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 small intestine tumors. **Note 2:** Give priority to coding depth of invasion or spread outside the small intestine for tumor with intraluminal or lateral extension to adjacent segment(s) of small intestine. **Note 3:** Tumor size must be known to assign T. You may use a physician’s statement of the T category if this is the only information in the medical record. * If no size or category is specified, assign TX **Note 4:** Assign the appropriate T category based on the tumor size for the following descriptions Invasion of polyp, NOS Tumor confined to muscular wall Tumor invades through submucosa and muscularis mucosae to involve mucosa Intraluminal spread to other segments of small intestine or cecum Invasion through muscularis propria or muscularis, NOS Extension through wall, NOS Subserosal tissue/(sub) serosal fat invaded Transmural, NOS Adjacent connective tissue Mesentery, including mesenteric fat Nonperitonealized perimuscular tissue Retroperitoneum Invasion of/through serosa (mesothelium) (tunica serosa) (visceral peritoneum) **Duodenum primaries (C170)** Ampulla of Vater Blood vessel(s), major Aorta Gastroduodenal artery Greater omentum Portal vein Renal vein Superior mesenteric artery or vein Vena cava Diaphragm Extrahepatic bile duct(s) Gallbladder Hepatic flexure Kidney (right or NOS) Liver (quadrate lobe, right lobe or NOS) Omentum Pancreas Pancreatic duct Stomach Transverse colon Ureter, right **Jejunum (C171) or Ileum (C172)** Bladder Colon, including appendix Fallopian tube(s) Ovary(ies) Uterus Confined to small intestine 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 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)