Similar findings were obtained in two articles investigating MSI prevalence and hMSH2/hMLH1 altered expression in salivary gland tumors, either benign or malignant: a low-frequency microsatellite instability and no significant hMSH2/hMLH1 expression difference between benign and malignant neoplasms were detected [39,41]. This evidence concerns the gene MSH2 and cancer.