Retroclival cysts. Report of two cases

Two cases of retroclival arachnoid cyst are presented. The clinical symptoms, putting aside the hydrocephalus, are dominated by pyramidal signs, oculomotor disorders and ataxia. In both cases, a posterior suprasellar extension was found as in the previous descriptions in the literature. This shows the close pathological relations of these cysts to the more classic suprasellar cysts.