Manifestations cutanées de la sarcoïdose

Sarcoidosis is a systemic granulomatous disease of unknown aetiology. Sarcoidosis skin manifestations are proteiform. They are classically separated in specific lesions which show histological granuloma and are often chronic, or non specific lesions, most typically erythema nodosum, which is most of the time an acute process. They are observed in about 25% of patients with sarcoidosis. Skin involvement may be inaugural. For the clinician, the diagnosis of skin sarcoidosis induces three problems: screening for systemic involvement, evaluating the prognosis, implementing a management combining a long-term follow-up and a treatment when skin lesions lead to disfigurement or functional disability.