Dermoscopic features of premature sebaceous hyperplasia = Dermoscopic features of premature sebaceous hyperplasia

다국어 초록 (Multilingual Abstract)

Background: Premature sebaceous hyperplasia (PSH) is a rare skin disorder of unknown etiology that commonly appears during puberty or just afterwards. It is clinically characterized as yellowish papules or plaques on the face, neck, and upper thorax. As a counterpart of PSH, dermoscopic features of sebaceous hyperplasia (SH) which occurs in the middle age have been well-described. Crown vessel surrounding cumulus sign is even diagnostic for SH. There was no previous study focusing on dermoscopic features of PSH.
Objectives: To investigate dermoscopic patterns of PSH and distinctive features different from SH.
Methods: Clinical and dermoscopic features were evaluated in 8 patients, histopathologically diagnosed as PSH.
Results: The patients' ages were between 13 and 30 years with the mean age of 18.1 years. Age at the onset ranged from 1 to 22 years with the mean age of 11.3 years. The most common site of occurrence was face. The lesions appeared as grouped forms in 5 patients and linear forms in 3 patients. The dermoscopic features showed cumulus sign, pseudofollicular opening, brown dot and globule, milia-like cyst, and small linear vessel (100%, 50%, 37.5%, 37.5%, and 37.5% respectively). None of the cases showed crown vessel or structural patterns of vessel.
Conclusion: Dermoscopy can provide valuable information for the diagnosis of PSH and useful clue for the etiopathogenesis of PSH, especially the lack of prominent vascular structures.