Blood samples from untreated patients diagnosed with clinically isolated syndrome (CIS) (<i>n</i> = 21), different clinical forms of MS (<i>n</i> = 62) [relapsing-remitting (RRMS), secondary progressive, and primary progressive], and healthy controls (HCs) (<i>n</i> = 17) were tested for plasma levels of interferon (IFN)-γ, IL-10, TGF-β, IL-17A, and IL-17F by immunoanalysis.