Pathologic T
This input is used for staging
Notes
**Note 1:** High grade dysplasia and severe dysplasia of the colon are generally not reportable in cancer registries. * Assign pTis if your registry collects these tumors **Note 2:** In situ includes cancer cells confined within the glandular basement membrane (intraepithelial); localized includes confined to lamina propria (intramucosal), the muscular mucosa, and muscularis propria. **Note 3:** 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 4:** Direct invasion in cT4b includes invasion of other organs or segments of the colorectum by way of the serosa, as confirmed on microscopic examination, or for tumors in a retroperitoneal or subperitoneal location, direct invasion of other organs or structures by virtue of extension beyond the muscularis propria. **Note 5:** Tumor that is adherent to other organs or structures, macroscopically, is classified T4b. However, if no tumor is present in the adhesion, microscopically, the classification should be pT1 - pT3. **Note 6:** Assign T4b for contiguous extension from the site of origin. Discontinuous involvement is coded in D (distant metastasis).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 Physician assigns pTX, no other information available to determine T |
| p0 | pT0 | No evidence of primary tumor | No evidence of primary tumor |
| pIS | pTis | Carcinoma in situ: intraepithelial or invasion of lamina propria | (Adeno)carcinoma, noninvasive, in a polyp or adenoma Invasive tumor confined to: Lamina propria, including lamina propria in the stalk of a polyp Mucosa, NOS, including intramucosal, NOS Muscularis mucosae (but not through), including muscularis mucosae in the stalk of a polyp Stated as Tis |
| p1 | pT1 | Tumor invades submucosa | Confined to: Head of polyp, NOS Stalk of polyp, NOS Invasive tumor in polyp, NOS Invades submucosa (superficial invasion), including submucosa in the head or stalk of polyp Confined to colon, NOS Localized, NOS Stated as T1 |
| p2 | pT2 | Tumor invades muscularis propria | Stated as T2 |
| p3 | pT3 | Tumor invades subserosa or into non-peritionealized pericolic or perirectal tissues | Extension through wall, NOS Invasion through muscularis propria or muscularis, NOS Non-peritonealized pericolic tissues invaded Perimuscular tissue invaded Subserosal tissue/(sub)serosal fat invaded Transmural, NOS Wall, 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 and flexures Gastrocolic ligament Greater omentum Fat, NOS Stated as T3 |
| p4 | pT4 | Tumor perforates visceral peritoneum and/or directly invades other organs or structures# | Note: T4 has subcategories of T4a and T4b. Assign T4 only when there is no information available to assign one of the subcategories Stated as T4 [NOS] |
| p4A | pT4a | Tumor perforates visceral peritoneum | Invasion of/through serosa (mesothelium) (visceral peritoneum) Tumor penetrates to surface of visceral peritoneum Stated as T4a |
| p4B | pT4b | Tumor directly invades other organs or structures | Adherent to other organs or structures clinically with no microscopic examination Tumor found in adhesion(s) if microscopic examination performed (see Note 5) Contiguous extension to: All colon sites: Abdominal wall Adrenal (suprarenal) gland Bladder Diaphragm Fallopian tube Fistula to skin Gallbladder Other segment(s) of colon via serosa Ovary Retroperitoneum Small intestine Uterus Cecum (C180): Greater omentum Kidney Liver Ureter 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): Greater omentum Left kidney Left ureter Pelvic wall Spleen Sigmoid colon (C187): Cul de sac (rectouterine pouch) Greater omentum Pelvic wall Ureter Stated as T4b (all colon subsites) |
| 88 | 88 | Not applicable | Primary site/histology not TNM defined 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) |