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A left middle cerebral artery aneurysm at the bifurcation (M1-M2 segment) and a right smaller aneurysm, symmetrical to the previous one were diagnosed in a 69-year-old female after angiographic examination for subarachnoid hemorrhage. The preoperative radiological study did not enable us to identify the bleeding aneurysm so a left supraorbital keyhole approach was performed to operate on the bigger aneurysm. In the same surgical session, using the same way of approach, we decided to attack also the right aneurysm which then revealed itself as being responsible for bleeding. The postoperative angiograms confirmed the complete exclusion of both aneurysms and the patient was discharged after good recovery. Although there are remarkable controversies about the surgical strategies for multiple aneurysms, our experience gives us the opportunity to emphasize the supraorbital keyhole approach and to reconsider the "timing" of multiple/bilateral aneurysms.

This study covers the evolution of 21 cases of pure acute epidural hematomas which have been classified as benign, semi-benign and malignant. For the authors immediate surgical treatment is only necessary for the cases of malignant evolution. For cases of semi-benign evolution surgical treatment can be delayed. No treatment is required for haematomas with a benign evolution.