Dermoscopy of Oral Mucosal Lesions: Experience from a Tertiary Care Center in North India and Review of Literature.

Background: Patients with mucosal lesions form a significant number of routine outpatients presenting to the dermatology department where diagnostic confirmation using histopathological examination of mucosal biopsy is neither feasible nor warranted in every patient. Objective: To study the dermoscopic features of various mucosal lesions affecting the oral cavity and to assess the reliability of mucoscopy vis-a-vis clinico-laboratory findings. Materials and Methods: An observational, cross-sectional, hospital-based study was conducted over a period of 2 years from March 2019 to February 2021 in the dermatology outpatient department. Patients presenting with oral mucosal lesions, with or without associated cutaneous involvement, were recruited for mucoscopic evaluation after taking an informed written consent. A detailed history and clinical examination, with emphasis on mucocutaneous examination, was performed and findings were recorded on a standard predesigned proforma. Mucoscopy of oral mucosa was carried out using a handheld dermoscope as well as Universal Serial Bus connected video-dermoscope in both nonpolarized and polarized modes. The different mucoscopic features were seen at these sites, compared with each other, analyzed and findings were recorded. A diagnosis was made on the basis of mucoscopic findings and correlated with clinical diagnosis. The data was analyzed using appropriate statistical tests. Results: The mean age of patients was 34.3 years and the mean lesional duration was 68.2 weeks. Oral lichen planus (18.66%) was the most common disorder studied, followed by recurrent apthous stomatitis (16.00%), pigmentary lesions (12.66%), vascular disorders (12.00%), mucocele (5.33%), pemphigus vulgaris (4.66%), and discoid lupus erythematosus (4.66%). Conclusion: Dermoscopy in oral lesions facilitates the visualization of the mucosal surface and provides quick confirmation of diagnosis in various mucosal disorders with advanced diagnostic accuracy. Mucoscopy was found helpful in differentiating the oral ulcers, which are a presenting feature of various serious mucocutaneous disorders. Mucoscopy could be a helpful aid in diagnosing pigmented skin lesions and alleviating the apprehension regarding oral melanoma and serve as a screening tool in case of squamous cell carcinoma lips. Limitations: Confirmatory histopathological analysis and correlation with mucoscopic findings could not be established in our study.