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• Vol.63 No.1
• CLINICA NEUROL, 63: 15−20, 2023
• Vol.63 No.1 contents

Case Report

A case of neurosyphilis presenting as sudden onset of limbic encephalitis

Kanako Akashi (Hasegawa), M.D.¹⁾, Yoshiaki Takahashi, M.D.²⁾, Mizuki Morimoto, M.D.²⁾, Kyoko Yokota, M.D.³⁾ and Nobutoshi Morimoto, M.D.²⁾

¹⁾ Postgraduate Medical Training Center, Kagawa Prefectural Central Hospital
²⁾ Neurology, Kagawa Prefectural Central Hospital
³⁾ Infectious Diseases, Kagawa Prefectural Central Hospital

A 52-year-old male was carried to hospital by ambulance, because of an abrupt abnormal behavior and impaired consciousness. Soon after the arrival, the patient started a generalized seizure. Although the seizure was stopped by Midazolam, amnesia were observed. With meningeal irritation signs, in addition to the clinical course, the patient was thought to develop limbic encephalitis. The cause of the encephalitis was diagnosed as neurosyphilis because of the positive serum and CSF syphilis reactions, and the patient was treated with penicillin G from the first admission day on. Steroid pulse therapy was also conducted, followed by acyclovir since herpes encephalitis could not be ruled out; the brain MRI showed left-side dominant T₂/FLAIR high intensity lesions in the bilateral temporal lobes and left hippocampus. With the treatment progression, the amnestic syndrome improved and the patient returned to work. Although neurosyphilis is a rare cause of acute onset limbic encephalitis, it is important to keep the possibility of this disease in mind in making a treatment plan.
Full Text of this Article in Japanese PDF (2103K)

(CLINICA NEUROL, 63: 15−20, 2023)
key words: encephalitis, neurosyphilis, acute encephalitis

(Received: 11-Jul-21)