Beuschlein et al. [36] reported that Ki67 in a powerful prognostic factor to the disease-free survival of ACC patients after surgery, grade 1 ACC with the positive staining of Ki67 less than 10%, grade 2 with positive area between 10 and19%, and Ki67-positive area higher than 20% links with grade 3 ACC tumors. Here, MKI67 is linked to adrenal cortex carcinoma.