CKS2 and neoplasm: The SMD and sROC curves of the combined microarray data indicated the overexpression of CKS2 in OS samples (Additional file 1: Fig. S3A, SMD = 1.38, 95%CI [− 0.01–2.77]), and the significance of CKS2 expression making a distinction between OS and non-tumor samples (Additional file 1: Fig. S4A, Sensitivity = 0.92[0.59–0.99], Specificity = 0.88[0.49–0.98], Additional file 1: Fig. S4B, AUC = 0.96 95%CI [0.93–0.97]), which was consistent with the IHC.