[Hypertrophic pachymeningitis, glomerulonephritis and P-ANCA associated small vessel vasculitis].

Hypertrophic pachymeningitis is a very unusual disease, the main characteristic of which is thickening of the dura mater. We describe a patient who started this illness showing chronic headache and pauciimmune necrotizing extracapillary perinuclear antineutrophil cytoplasmic antibody (P-ANCA) associated glomerulonephritis. The diagnosis was made by brain magnetic resonance image.