Nada Bennouna, Kenza Baline, Fouzia Hali, Asmaa Elkebir, Farida Marnissi and Soumiya Chiheb
Rosai-Dorfman disease (RDD) is a benign non-Langerhansian histiocytosis mainly affecting lymph node areas. Although cutaneous involvement in RDD is common, purely cutaneous disease is rare and poorly documented. We report the case of a 25-year-old female patient presenting with a 6-month history of a slow-growing asymptomatic lesion of the right cheek mimicking a cutaneous sarcoidosis. The aim of this article is to describe this rare entity with the presentation of a new dermoscopic finding: the hairpin vessels. We also highlight the differential diagnosis with sarcoidosis.
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