Specifically regarding gastric cancer (GC), an array of KIF members, such as KIF5B [18], KIF1B [19], KIF14 [20], KIF11 [21], KIF15 [21], KIF18A [22], KIF20A [23], KIF21B [24], KIF22 [25], KIF23 [26], KIF26A [27], KIF26B [28], and more, have been recognized for their involvement in the progression of gastric cancer via various mechanisms. Here, KIF21B is linked to gastric cancer.