Dermoscopic diagnosis of epidermal cyst

Aim: The clinical features of epidermal cyst (EC) are well known, however, dermoscopic aspect of the entity has rarely been a subjectof investigation. Here we aimed to identify the dermoscopic findings of EC which may increase the accuracy of diagnosis beforesurgical interventions.Material and Methods: The study included the patients diagnosed with EC those who applied to outpatient dermatology clinicof a tertiary center. Age and gender of the patients, disease durations, symptoms, site and size of the lesions, dermoscopic andhistopathological findings were retrospectively reviewed.Results: A total of 24 lesions from 24 patients were enrolled in the study. The most common dermoscopic finding was whitestructureless background (96%) followed by punctum/pore sign (75%), widely distributed/branched irregular linear vessels (71%),blue-white structureless color (46%), mobility sign (41%), peripheral thick branched vessel (33%) and polychromatic structures (4%).Conclusion: We describe two novel dermoscopic features which were not described previously for EC: Mobility sign and polychromaticstructures. Along with the previous studies, our study revealed that EC has a peculiar dermoscopic pattern. Dermoscopic examinationmay increase diagnostic accuracy before surgery making possible a management with minimal invasive procedures.

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