ALB and central nervous system cancer: In recent years, the prognostic value of preoperative hematological markers, such as neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), monocyte-to-lymphocyte ratio (MLR), median platelet volume (MPV), platelet distribution width (PDW), and albumin-to-globulin ratio (AGR), has been investigated in several cancers, including gliomas [10–17].