tPA and proBDNF yielded good diagnostic power for differentiating BM and BD form HCs (tPA: AUC = 0.813 for BM and AUC = 0.815 for BD; proBDNF: AUC = 0.813 for BM and AUC = 0.886 for BD); while p75NTR and TrkB provided a fair differential efficacy with AUC = 0.719 and 0.753 for BM and BD, respectively. Here, BDNF is linked to Behcet disease.