Oral mucosal lesions in psoriatic patients based on disease severity and treatment approach.

BACKGROUND: This observational case-control study was designed to investigate the frequency of oral lesions in psoriatic patients and to identify an association between mucosal involvement, the severity of the disease, and a form of treatment. METHODS: One hundred twenty-seven patients diagnosed with psoriasis were enrolled in this study from November 2018 to September 2019. The oral mucosa evaluation was based on the clinical appearance, location, and morphology of the lesions. All patients completed a general medical history and a Dermatology Life Quality Index (DLQI) questionnaire. The severity of skin involvement was assessed using the Psoriasis Area and Severity Index (PASI) scale. RESULTS: The most common oral lesions in patients with psoriasis were found to be fissured (FT), white coated (CT), and geographic tongue (GT). A significantly lower prevalence of GT was evident in the group managed with a new class of biological drugs and smokers. There appeared to be no association between the oral manifestation and the PASI score. FT appeared significantly more often in patients that experienced an extremely large effect of psoriasis on their quality of life as determined by the DLQI questionnaire and smokers. Only 25% of patients presented normal oral mucosa. CONCLUSIONS: Tongue lesions seem to be associated with skin psoriasis regardless of the treatment. The severity of the disease, according to the PASI scale, does not influence mucosal involvement. The type of treatment may affect the prevalence of oral lesions. Further investigations are required to confirm the influence of biological therapies on mucosal improvement.