We found anti-nuclear antibodies (ANA) in 26.7% of 150 relapsing-remit
ting and in 30.4% of 23 chronic progressive definite multiple sclerosi
s (MS) patients by retrospective chart review. These patients did not
have systemic lupus erythematosus. Since ANA are not pathogenically re
levant in MS, they are false-positive, and likely reflect systemic imm
une dysregulation in MS.