Intraoperative CT scan findings during resection of glial tumours.

Intraoperative computerized tomographic (CT) scan findings in two cases during resection of glial tumor are described. These intraoperative CT images were obtained by an exclusively developed operating CT scanner system for use in the operating room. Repeated intraoperative CT scans taken during tumor removal showed shift of the brain including central structures and displacement of the cortical subarachnoid space in both cases. With contrast medium, the edge of the surrounding brain after resection was enhanced and a round enhanced area was observed in distant white matter. The distant enhancement, which we call 'remote enhancement', probably suggests damage to the blood-brain barrier due to surgical manoeuvre.