Case Report

WHO Grade 2 Neuroendocrine Tumor in a 15-Year-Old Male: A Case Report and Literature Review

Table 2

2010 WHO classification of neuroendocrine neoplasms [2].

GradeMitotic count (per 10 high power fields)Ki67 proliferation index

G1Less than 22% or less
G22–203–20%
G3Greater than 20Greater than 20%