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Table 2 ENETS staging system for PNET [28]

From: Treatment options for PNET liver metastases: a systematic review

Stage T N M
I T1 N0 M0
IIA T2 N0 M0
IIB T3 N0 M0
IIIB Any T N1 M0
IV Any T Any N M1
  1. ENETS European Neuroendocrine Tumor Society, PNET pancreatic neuroendocrine tumors, T1 tumors < 2 cm limited to the pancreas, T2 2–4 cm limited to the pancreas, T3 > 4 cm limited to the pancreas or invading the duodenum or common bile duct, T4 tumor invading adjacent structures or large vessels, N0 no regional lymph node metastases, N1 regional lymph node metastases, M0 no distant metastases, M1 distant metastases