Pachymeningitis is a rare illness which can be shown by magnetic resonance imaging (MRI) to be a thickening of the intracranial dura mater, when associated with an infectious, malignant, or rheumatic systematic disease.^1–,⁶ “Idiopathic hypertrophic cranial pachymeningitis” is also noticeable, and is based on a process of chronic inflammation whose cause is unclear.⁴ Typical symptoms are chronic headaches, facial pain, cerebella ataxia, …