Among the studies including OPMD subjects, six articles investigated the diagnostic utility of the salivary cytokine level by ROC curve analysis and compared the ability of selected cytokines (IL-6, IL-8, TNF-α) to differentiate between patients with OSCC and OPMD [27,40,43,44,45,46]. The gene discussed is IL6; the disease is oculopharyngeal muscular dystrophy.