A significant positive correlation was observed between C1GALT1 and MKI67 expression in nearly all cancer types—except glioblastoma—including stomach, pancreas, colon, rectum, cervical, bladder, kidney‐clear cell, head and neck (HPV+/−), thyroid, breast, prostate, testicular, ovarian, liver, and melanoma. This evidence concerns the gene C1GALT1 and glioblastoma.