A mitotic count of < 2 per 10 high-power fields (hpf) and/or a Ki-67 index < 3% corresponds to NET G1; a mitotic count of 2-20/10 hpf and/or a Ki-67 index of 3%-20% to NET G2, and a mitotic count of > 20/10 hpf and/or a Ki-67 index > 20% to NEC [3]. The gene discussed is MKI67; the disease is neuroendocrine carcinoma.