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Gastrointestinal Carcinoid Tumors Treatment (PDQ®)

  • Updated: 02/28/2014

Table 2. Primary Tumor (T)a

aReprinted with permission from AJCC: Neuroendocrine tumors. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 181-9.
TXPrimary tumor cannot be assessed.
T0No evidence of primary tumor.
TisCarcinoma in situ/dysplasia (tumor size <0.5 mm), confined to mucosa.
T1Tumor invades lamina propria or submucosa and ≤1 cm in size.
T2Tumor invades muscularis propria or >1 cm in size.
T3Tumor penetrates subserosa.
T4Tumor invades visceral peritoneum (serosal) or other organs or adjacent structures.
For any T, add (m) for multiple tumors.