Mixed neuroendocrine non-neuroendocrine neoplasms in gastroenteropancreatic tract

Table 1 Classification of neuroendocrine component according to morphology, mitoses, and differentiation

Neuroendocrine component	Mitotic index	Ki-67
NET G1	Mitotic index < 2 per 10 high-power field	Ki-67 < 3%
NET G2	Mitotic index 2-20 high-power field	Ki-67 3%-20%
NET G3	Mitotic index > 20 high-power field	Ki-67 > 20%
Poorly differentiated neuroendocrine cancers	Mitotic index > 20 high-power field	Ki-67 > 20%

NET: Neuroendocrine tumours; G: Grade.