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Updated: Sep 4, 2025

Induction and Clinical Scoring of Chronic-Relapsing Experimental Autoimmune Encephalomyelitis
Published on: July 4, 2007
Relapsing Polychondritis and Aseptic Meningoencephalitis
Kazuhiro Yokota1, Hideyuki Tachibana2, Akifumi Miyake3
1Department of Rheumatology and Applied Immunology, Faculty of Medicine, Saitama Medical University, Japan.
Abstract:
We herein report a 49-year-old Japanese man with relapsing polychondritis (RP) and aseptic meningoencephalitis. Four years ago, the patient was diagnosed with RP. Prednisolone (PSL) was started at 30 mg/day, and the symptoms promptly disappeared. However, cognitive impairment gradually appeared from six months before hospitalization. Methylprednisolone pulse therapy was immediately initiated, followed by administration of PSL at 1 mg/kg/day. Intravenous cyclophosphamide was combined with PSL. After treatment, the patient's cognitive impairment clearly improved. In conclusion, RP rarely causes aseptic meningoencephalitis, highlighting the need for prompt and aggressive immunosuppressive therapy.
Insights
Relapsing polychondritis (RP) can rarely cause aseptic meningoencephalitis. Prompt, aggressive immunosuppressive therapy, including steroids and cyclophosphamide, significantly improved cognitive impairment in a patient with RP.
Area of Science:
- Neurology
- Immunology
- Rheumatology
Background:
- Relapsing polychondritis (RP) is a rare systemic autoimmune disease primarily affecting cartilage.
- Neurological manifestations of RP are uncommon but can be severe.
Observation:
- A 49-year-old man with a history of RP developed progressive cognitive impairment.
- The patient's neurological symptoms emerged despite initial treatment for RP.
Findings:
- Aggressive immunosuppressive therapy, including methylprednisolone pulse therapy, oral prednisolone (PSL), and intravenous cyclophosphamide, was initiated.
- The combination therapy led to a clear improvement in the patient's cognitive impairment.
Implications:
- This case underscores the rare but serious neurological complication of aseptic meningoencephalitis in relapsing polychondritis.
- Early and intensive immunosuppression is crucial for managing neurological involvement in RP.
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