In subgroup analyses of FTCs (including Hürthle cell carcinoma) in Cohort A, no significant difference in Ki-67 index between minimally (median: 4%; min–max: 1–15%) and widely invasive (median: 3%; min–max: 1–30%) FTC was observed based on the WHO 2004 classification (Fig. 4a). Here, MKI67 is linked to thyroid cancer, nonmedullary, 2.