Reversible Distension of the Subarachnoid Space around the Optic Nerves in a Case of Idiopathic Hypertrophic Pachymeningitis

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  • HIRAKA Toshitada
    Department of Neurology, Hematology, Metabolism, Endocrinology, and Diabetology, Yamagata University Faculty of Medicine Department of Diagnostic Radiology, Yamagata University Faculty of Medicine
  • KOYAMA Shingo
    Department of Neurology, Hematology, Metabolism, Endocrinology, and Diabetology, Yamagata University Faculty of Medicine
  • KUROKAWA Katsuro
    Department of Neurology, Hematology, Metabolism, Endocrinology, and Diabetology, Yamagata University Faculty of Medicine
  • TANJI Haruko
    Department of Neurology, Hematology, Metabolism, Endocrinology, and Diabetology, Yamagata University Faculty of Medicine
  • ISEKI Chifumi
    Department of Neurology, Hematology, Metabolism, Endocrinology, and Diabetology, Yamagata University Faculty of Medicine
  • WADA Manabu
    Department of Neurology, Hematology, Metabolism, Endocrinology, and Diabetology, Yamagata University Faculty of Medicine
  • KAWANAMI Toru
    Department of Neurology, Hematology, Metabolism, Endocrinology, and Diabetology, Yamagata University Faculty of Medicine
  • ODA Atsuko
    Department of Diagnostic Radiology, Yamagata University Faculty of Medicine
  • HOSOYA Takaaki
    Department of Diagnostic Radiology, Yamagata University Faculty of Medicine
  • KATO Takeo
    Department of Neurology, Hematology, Metabolism, Endocrinology, and Diabetology, Yamagata University Faculty of Medicine

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Abstract

Idiopathic hypertrophic pachymeningitis (IHP) is a chronic inflammatory disease of unknown cause. We report a case of IHP with bilateral distended subarachnoid space (SAS) of the optic nerves and unilateral visual disturbance. We observed marked amelioration of magnetic resonance (MR) imaging findings after initiation of treatment with prednisolone. This radiological finding implicates optic nerve sheath involvement that affects cerebrospinal fluid (CSF) dynamics around the optic nerve.<br>

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