SMPD3 and psoriasis: The ROC curves (Figures 8B–J) demonstrated that the expression levels of eight Hub Genes—POSTN, CD274, CD24, SERPINB3, CXCL13, SMPD3, BIRC5, and RAB27A—exhibited high accuracy (AUC > 0.9) in classifying the Psoriasis and Control groups.