Figure 3. (A) PNEN G1 with Ki-67 index of less than 3%. (B) PNEN G2 with Ki-67 index of 3% to 20%. (C) PNEN G3 with Ki-67 index higher than 20%. This figure has been adapted from Archives of Pathology & Laboratory Medicine, Fang J. M. and Shi J., A clinicopathologic and molecular update of pancreatic neuroendocrine neoplasms with a focus on the new world health organization classification, 143 (11): 1317-1326. © 2019 (59).