Abstract
Middle cerebral artery (MCA) dolichoectasia is rare. We report 2 cases of MCA dolichoectasia. The patients complained of headache or dizziness, respectively. Postcontrast CT scans showed small enhanced masses at the site of the MCA lesions that seemed to be cerebral aneurysm. The patients were examined by cerebral angiography after admission to our hospital. However conventional angiography could not completely differentiate these lesions from saccular aneurysms. Three-dimensional (3D)-CT angiography successfully demonstrated the configuration of the lesion clear1y to allow the diagnosis of dolichoectasia. We concluded that MCA dolichoectasia should be differentiated from saccular aneurysm preoperatively and that 3D-CT angiography is a useful tool for this purpose.
