This figure is a compilation of reports by Solcia et al and agreed upon by the WHO international
registry that divides Gastroenteropancreatic NETs into the GI tract and pancreas NETs. There are three tiers
starting with a well-differentiated pancreatic tumor, a second tier of a well differentiated endocrine carcinoma
which is really still a low grade level of malignancy and the a poorly differentiated endocrine carcinoma
which has a high grade of malignancy.