Abstract
Rheumatoid meningitis (RM) is a rare but treatable central nervous system (CNS) manifestation of rheumatoid arthritis (RA) with various clinical presentations and atypical cerebrospinal fluid (CSF) findings. There are no established biomarkers for RM, making diagnosis a challenge. Herein, we present three cases of RM: two patients with RA diagnosis and one without. CSF analysis showed pleocytosis in only one case. In contrast, CSF neopterin levels were elevated in all three cases and decreased after steroid therapy. This study suggests that CSF neopterin levels may be a useful biomarker for diagnosing and therapeutically monitoring CNS inflammation in patients with RM.
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