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Staging (Small Intestine)
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Staging (Small Intestine)
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Pathologic Staging (pTNM) AJCC 8th Edition
CAP Approved Gastrointestinal • Small Intestine 4.0.0.0
TNM Descriptors (required only if applicable) (select all that apply)
___ m (multiple primary tumors)
___ r (recurrent)
___ y (posttreatment)
Primary Tumor (pT)
___ pTX: Primary tumor cannot be assessed
___ pT0: No evidence of primary tumor
___ pTis: High-grade dysplasia/carcinoma in situ
___ pT1 Tumor invades the lamina propria or submucosa
___ pT1a: Tumor invades the lamina propria
___ pT1b: Tumor invades the submucosa
___ pT2: Tumor invades the muscularis propria
___ pT3: Tumor invades through the muscularis propria into the subserosa or extends into the nonperitonealized perimuscular tissue (mesentery or retroperitoneum) without serosal penetration#
___ pT4: Tumor perforates the visceral peritoneum or directly invades other organs or structures (e.g., other loops of small i ntestine, mesentery of adjacent loops of bowel, and abdominal wall by way of serosa; for duodenum only, invasion of pancreas or bile duct)
# Note: For T3 tumors, the nonperitonealized perimuscular tissue is, for the jejunum and ileum, part of the mesentery and, for the duodenum in areas where serosa is lacking, part of the interface with the pancreas.
Regional Lymph Nodes (pN)
___ pNX: Regional lymph nodes cannot be assessed
___ pN0: No regional lymph node metastasis
___ pN1: Metastasis in one or two regional lymph nodes
___ pN2: Metastasis in three or more regional lymph nodes
Distant Metastasis (pM) (required only if confirmed pathologically in this case)
___ pM1: Distant metastasis
Specify site(s), if known: ______________________
Summary of changes AJCC 7th to 8th ed.