[Intracranial aneurysm and polycystic kidneys].

Five cases of intracranial aneurysms with polycystic kidneys are reported: --15% of polycystic kidneys have an intracranial aneurysm, and about 4% - 5% of intracranial aneurysms are joined with polycystic kidneys; --the surgical treatment of intracranial aneurysm with this association doesn't present more risk than an intracranial aneurysm, and the surgical prognosis isn't bad; --the pathogeny isn't clear. This association is perhaps a congenital elastic system disease.