[Steroid-Resistant Central Nervous System Sarcoidosis: The Selections of Multi-Agent Combination as the Initial Treatment].

Sarcoidosis is a granulomatous multiorgan disease of unknown etiology that commonly affects the respiratory system, eyes, and skin, and less commonly affects the nervous system. Because of its rarity, a standard treatment for central nervous system (CNS) sarcoidosis has not yet been established. Corticosteroids remain the cornerstone of CNS sarcoidosis treatment. However, CNS sarcoidosis, other than isolated facial nerve paralysis, is often refractory to treatment and requires long-term corticosteroid treatment. In particular, patients with hydrocephalus have a high mortality rate and a lack of response to this treatment. Therefore, immunosuppressants, including TNF-α inhibitors and corticosteroids, should be considered as the initial treatment. For older patients, it is important to pay attention to infection as an adverse event and to the toxicity of the therapeutic agents. Because steroid-related adverse events are more common in the older patient group, the lowest effective dose should be used, and the treatment duration should be kept as short as possible after careful evaluation of disease activity. Corticosteroid-sparing agents are effective at reducing the cumulative toxicity of corticosteroids. Recently, various new potential agents have emerged and their efficacy has been assessed. It is expected that more treatment options will be available for CNS sarcoidosis in future.