MKI67 and neoplasm: In the hematological low-risk group, large tumor size, PTBE, and high Ki-67 index were associated with higher relapse probability and shorter PFS (Figures 5C, E, H, subgroup 1 vs. subgroup 3; P < 0.05); nevertheless, in the high-risk group, these factors did not apparently affect the progression risk of AM or PFS of patients (subgroup 2 vs. subgroup 4; P > 0.05).