Case Report of a Rare Cutaneous Manifestation of Sarcoidosis

Sarcoidosis is a multisystem granulomatous disease of unknown etiology and pathogenesis with a chronic course characterized by multiple remissions and relapses. Besides a brief review of relevant literature, this paper reports on a 70-year-old Saudi male patient who presented with a rare form of cutaneous sarcoidosis masquerading as psoriasis. Physical examination revealed presence of multiple, symmetrical erythematous plaques covered with silvery white, adherent scales involving elbows, knees, scalp and side of both buttocks but complete absence of similar lesions in genitalia and nails. Though radiological findings suggested sarcoidosis, cutaneous sarcoidosis was finally diagnosed by morphological changesnoncaseating, granulomatous inflammation as revealed by skin biopsy. After two months of treatment with prednisolone and other medications, this patient showed considerable improvement and all lesions disappeared. In the light of this case and review of literature, several aspects of cutaneous sarcoidosis presenting as psoriasis are discussed.