“…Various oral manifestations of COVID-19 have been reported in human patients, including dry mouth, gustatory impairment, gingivitis, sialadenitis, vesicular and ulcerative mucosal lesions predominantly located on dorsal surface of the tongue (as in our case), hard palate, and labial mucosa (45)(46)(47). The exact pathogenesis of such oral signs remains uncertain, probably involving several mechanisms, such as deterioration of the general health status, hypersensitivity of drugs used for COVID-19 treatment, stress, immunosuppression, vasculitis, and hyper-inflammatory response secondary to SARS CoV-2 infection as predisposing factors (45)(46)(47). In addition, high expression of ACE2, recognized as the SARS-CoV-2 entry ligand receptor, has been reported in cells of the oral cavity, predominantly in epithelial cells of the tongue, and in buccal and gingival tissues at a lesser extent, thus predisposing to oral SARS-CoV-2 infection with a local virus effect (48).…”