Likewise, in the present study, we found no significant differences in salivary ADA between the OPMD group and the controls, and there were also no differences on comparing the concrete diagnoses of oral lichen planus and oral leukoplakia, thus underscoring the need for further research in this field—the diagnostic and prognostic value of such markers often requires validation through extensive clinical studies. Here, ADA is linked to oculopharyngeal muscular dystrophy.