MKI67 and neoplasm: On the other hand, the reason for the contrasting findings reported in the meta-analysis could be that the Ki67 index from 3.5% to 35% was considered high. In our study, patients were noticed to have less chance of developing solid organ metastasis except those who were <40 years of age, tumor stage 4 (T4), grade 3, and involvement of lymph nodes.