[Chronic hypertrophic pachymeningitis: 2 clinical cases are presented].

Chronic hypertrophic pachymeningitis is an inflammatory process of unknown aetiology characterised by a thickening of the dura mater causing pseudotumoural growth. Clinical manifestations are usually secondary to compression of adjacent neurological structures but may be also secondary to inflammatory processes. Diagnosis is mainly obtained by excluding infectious, neoplastic and autoimmune causes.