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Background:The periungual dermoscopy is a non-invasive tool to study the qualitative and quantitative microcirculation at the level of proximal fold. It is increasingly used in dermatology in the study of systemic diseases. Materiels and Methods:We describe the dermoscopic periungual appearance of 153 patients followed for various systemic diseases in the dermatology department of CHU HASSAN II in Fes, while comparing our results with those of the literature. The examination was performed with a photofinder dermoscope then dermlite by simple transillumination of the cutaneous epithelium illuminated by the dermoscope light.Discussion: Dermoscopy makes it easy to distinguish a normal capillaroscopic landscape during primary Raynaud's phenomenon (RP), from a sclerodermic landscape reflecting organic microangiopathy specific to scleroderma, dermatomyositis or mixed connective tissue or overlap. Periungual dermoscopy can also be used to assess the risk of digital ulcers and visceral complications in patients with scleroderma.

Angiokeratoma circumscriptum naviforme (ACN) are sharply circumscribed hyperkeratotic vascular lesions that are often located on the lower extremities. It is called as naevoid (naviforme) since it is seen at birth or after birth and it is the rarest type of angiokeratomas. ACN is not related with other systemic diseases. Lesions of the disease are usually located in the extremities and are unilaterally localized. In this article, we present a case of seven-year-old girl with typical clinical manifestations.

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