Abstract: 【Abstract】 Objective To investigate dermoscopic features of molluscum contagiosum. Methods A total of 82 outpatients with molluscum contagiosum were collected from Dalian Dermatosis Hospital between August 2019 and January 2020, and the dermoscopic features of 227 skin lesions were analyzed retrospectively. Results Of the 227 skin lesions, hilar depression and orifices were observed in 120 （52.86%） by naked eyes and 198 （87.22%） by dermoscopy, and blood vessels were observed in 20 （8.81%） by naked eyes and 214 （94.27%） by dermoscopy. Different vascular patterns were identified by dermoscopy, including crown-shaped vessels （132 lesions, 58.15%）, punctate vessels （34 lesions, 15.00%）, and a mixed pattern （48 lesions, 21.15%）. The proportion of punctate vessels was significantly higher in lesions with inflammation or exfoliation （86.00%） than in those without （22.03%, χ2 = 81.685, P < 0.001）, and significantly higher in lesions with eczematous changes （50.00%） than in those without （33.85%, χ2 = 17.784, P < 0.001）. The most frequently observed structures were round, white-yellow, amorphous structures （40.53%）, followed by four-leaf clover-like pattern （33.48%）, polylobular pattern （20.26%） and nonspecific pattern （5.73%）. Conclusion Orifices, vascular structures and white-yellow amorphous structures can be observed in molluscum contagiosum by dermoscopy, and the most common vascular pattern is the crown-shaped vessel.

Key words: Molluscum contagiosum, Dermoscopy, Skin manifestations, Diagnosis