Abstract
Sarcoidosis is a multisystem granulomatous disease and approximately one third of patients with the systemic form develop skin lesions. We present a case of cutaneous sarcoidosis associated with autoimmune thyroiditis and vitiligo. Although this association is rare by itself, it imposes the theory of autoimmune etiology of sarcoidosis. Moreover, our patient presented with elevated levels of serum chitotriosidase, a known biomarker in the activity of systemic sarcoidosis. To the best of our knowledge, there are no reports of chitotriosidase in isolated cutaneous sarcoidosis, raising a possible field for future research.