Evaluating the Presence of a Stage IV Low-Grade Well-Differentiated Neuroendocrine Tumor of the Ileocecum: A Case Report with Evaluation of Staging Protocol of Neuroendocrine Tumors and Treatment Options Based on Current Available Evidence
Table 2
NET of the colon and rectum TNM staging AJCC UICC 8th edition.
Primary tumor (T)
Regional lymph nodes (N)
Distant metastasis (M)
T category
T criteria
N category
N criteria
M category
M criteria
T0
No evidence of a primary tumor
N0
No regional lymph node metastasis
M0
No distant metastasis
T1
Invades lamina propria or submucosa and is less than or equal to 2 cm
N1
Regional lymph node metastasis
M1
Distant metastasis
T2
Invades muscularis propria or is >2 cm with invasion of the lamina propria or submucosa
T3
Invades through muscularis propria into subserosal tissue
T4
Tumor invades visceral peritoneum or other adjacent structures
