Clinical T

This input is used for staging

Notes

**Note 1:** Assign 88 for in situ cases (behavior code /2). TNM does not include an in situ category for NET small intestine tumors. **Note 2:** Ignore intraluminal extension to adjacent segment(s) of colon/rectum or to the ileum from the cecum; code depth of invasion or extracolonic spread as indicated. **Note 3:** The nonperitonealized perimuscular tissue is, for jejunum and ileum, part of the mesentery and, for duodenum in areas where serosa is lacking, part of the retroperitoneum. **Note 4:** 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 5:** Assign the appropriate T category (T1, T2) based on the tumor size for the following descriptions: Invasive tumor confined to mucosa, NOS including intramucosal, NOS Invades lamina propria, including lamina propria in the stalk of a polyp Invades submucosa (superficial invasion), including submucosa in the stalk of a polyp Confined to and not through the muscularis mucosae, including muscularis mucosae in the stalk of a polyp Confined to colon, NOS Localized, NOS **Note 6:** Assign T4 for tumor with macroscopic adhesions to other organs or structures and for pathologically confirmed tumor in adhesions. * If no tumor is present in adhesions upon microscopic examination, use lower codes to describe the microscopically confirmed depth of tumor invasion for these cases

NAACCR Item

NAACCR #940

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	No evidence of primary tumor
c1	cT1	Tumor invades lamina propria or submucosa and is no greater than 1 cm in size	Confined to: Mucosa, NOS, including intramucosal, NOS Muscularis mucosae, including muscularis mucosae in a polyp Intraluminal spread to other segments of small intestine or cecum Localized, NOS Stated as T1
c2	cT2	Tumor invades muscularis propria or is greater than 1 cm in size	Muscularis propria invaded Stated as T2
c3	cT3	Jejunal or ileal tumor invades subserosa Ampullary or duodenal tumor invades pancreas or retroperitoneum	Adjacent connective tissue Fat, NOS Invasion through muscularis propria or muscularis, NOS Extension through wall, NOS Mesentery Nonperitonealized perimuscular tissue Subserosal tissue/(sub)serosal fat invaded Transmural, NOS For duodenum primary only (C170): Ampulla of Vater Pancreatic duct Stated as T3
c4	cT4	Tumor perforates visceral peritoneum (serosa) or invades other organs or adjacent structures	Invasion of/through serosa (mesothelium) (tunica serosa) (visceral peritoneum) For all small intestine sites: Abdominal wall Other segments of the small intestine via serosa For duodenum primary only (C170): Blood vessel(s), major: Aorta Gastroduodenal artery Portal vein Renal vein Superior mesenteric artery or vein Vena cava Diaphragm Extrahepatic bile ducts Gallbladder Hepatic flexure Kidney, right or NOS Liver Omentum Stomach Transverse colon Ureter, right For jejunum or ileum primary only (C171, C172): Bladder Colon, including appendix Fallopian tube Ovary Retroperitoneum invaded greater than 2 cm in depth Uterus 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	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)