[Severe chronic headache with depression induced by pachymeningitis in Wegener's granulomatosis].

Pachymeningitis, as demonstrated on MRI, is a rare manifestation of inflammatory cerebrovascular involvement in Wegener's granulomatosis. Pachymeningitis should be considered in patients with severe and persistent headache of unknown aetiology, as well as in patients with Wegener's granulomatosis with recent onset of headache.