Bifrontal oligodendroglioma with bilateral symmetrical posterior communicating artery aneurysms.

A case of bifrontal oligodendroglioma with bilateral posterior communicating artery aneurysms, one symptomatic and the other incidental, is presented. This is the first instance of such a combination. Clipping of the aneurysm, along with partial tumour excision, was performed at the same sitting, successfully. Literature on this association is reviewed and the pathogenesis is discussed.