Sarcoidosis of the Skin as an Interdisciplinary Problem

Sarcoidosis is a disease of unknown etiology characterized by the formation of epithelioid cell granulomas in several organs or tissues without caseous necrosis (fibrinoid necrosis may occur). With sarcoidosis, almost all organs and tissues can be affected, which determines the interdisciplinary nature of the problem. Skin sarcoidosis is one of the most common manifestations of systemic sarcoidosis. At the same time, the role of dermatologists in the diagnosis of sarcoidosis is exceptionally large, since skin lesions are often the key to the discovery of systemic sarcoidosis, which allows internists to purposefully and timely diagnose and treat lesions of internal organs. Skin rashes in patients with sarcoidosis may occur secondarily against the background of specific lesions of the lungs, intrathoracic nodes and other internal organs, however, skin sarcoidosis may also develop primarily. All forms of skin sarcoidosis may be the only manifestation of the disease, and it is impossible to distinguish clinically and histologically between skin changes in systemic sarcoidosis and skin lesions alone. Treatment of skin sarcoidosis often presents great difficulties and includes, depending on the prevalence and activity of the process, local (corticosteroids, tacrolimus) and systemic therapy (immunomodulators, immunosuppressors, TNF inhibitors).