MKI67 and neoplasm: In 2017 WHO published a new classification specific for pancreatic NENs, based on proliferation parameters (Ki‐67 and/or MI), and morphological features (well‐differentiated [WED] versus poorly differentiated [POD] tumors), and also on percentage of neuroendocrine component (at least 30% of the neoplasm) relative to the non‐neuroendocrine component 5.