Pathologic 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 colon 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:** Tumor size must be known to assign a value of T1 or T2. You may use a physician’s statement of the T (sub)category if this is the only information in the medical record. * If the tumor appears to be in the T1 or T2 (sub)categories, but no size or category is specified, assign TX **Note 4:** Assign the appropriate T (sub)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 5:** 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, assign the appropriate T category to describe the microscopically confirmed depth of tumor invasion for these cases

NAACCR Item

NAACCR #880

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 2 cm in size	Note: T1 has subcategories of T1a and T1b. Assign T1 only when there is no information available to assign one of the subcategories Stated as T1 [NOS]
p1A	pT1a	Tumor less than 1 cm in size	Stated as T1a
p1B	pT1b	Tumor 1-2 cm in size	Stated as T1b
p2	pT2	Tumor invades muscularis propria or is greater than 2 cm in size	Muscularis propria invaded Stated as T2
p3	pT3	Tumor invades subserosa, or non-peritonealized pericolic or perirectal tissues	Extension through wall, NOS Through muscularis propria or muscularis, NOS Perimuscular tissue invaded Subserosal tissue/(sub)serosal fat invaded Transmural, NOS Extension to: All colon sites: Adjacent tissue(s), NOS Connective tissue Mesenteric fat Mesentery Mesocolon Pericolic fat Ascending and descending colon: Retroperitoneal fat Transverse colon/flexures: Gastrocolic ligament Greater omentum Fat, NOS Stated as T3
p4	pT4	Tumor perforates peritoneum or invades other organs	Invasion of/through serosa (mesothelium) (visceral peritoneum) Adherent to other organs or structures, NOS All colon sites: Abdominal wall Adrenal (suprarenal) gland Bladder Diaphragm Fistula to skin Gallbladder Other segment(s) of colon via serosa Small intestine Retroperitoneum (excluding fat) Cecum (C180): Fallopian tube Greater omentum Kidney Liver Ovary Ureter Uterus Ascending colon (C182): Greater omentum Liver, right lobe Right kidney Right ureter Transverse colon and flexures (C183, C184, C185): Gallbladder/bile ducts Kidney Liver Pancreas Spleen Stomach Ureter Descending colon (C186): Fallopian tube Greater omentum Left kidney Left ureter Ovary Pelvic wall Spleen Uterus Sigmoid colon (C187): Cul de sac (rectouterine pouch) Fallopian tube Greater omentum Ovary Pelvic wall Uterus 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)