Clinical 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


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
c1 cT1 Tumor 2 cm or less in greatest dimension Stated as T1
c2 cT2 Tumor more than 2 cm but not more than 5 cm in greatest dimension Stated as T2
c3 cT3 Tumor more than 5 cm but not more than 10 cm in greatest dimension Stated as T3
c4 cT4 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 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)