Recently, Smriti et al. used a commercial ELISA kit to evaluate salivary MMP-9 levels in 88 cases, including OSCC (n = 24), OPMD (n = 20), tobacco users (n = 22), and healthy controls (n = 22), collected from a hospital in India [66]. Here, MMP9 is linked to oculopharyngeal muscular dystrophy.