Giroud M, Beuriat P, Becker F, Binnert D, Dumas R
Service de Neurologie, Hôpital Général, Dijon.
Rev Neurol (Paris). 1990;146(3):224-7.
Five cases of infarction in the territory of the middle cerebral artery (MCA) are reported. The main feature common to these 5 cases was the presence at CT without contrast injection, in the first 24 hours, of a spontaneous hyperdensity of the ipsilateral MCA. In one case, angiography demonstrated that this hyperdensity was associated with occlusion. In 2 other cases, doppler examination showed occlusion of the internal carotid artery. The transient character of these radiological findings is underlined. In the acute phase of an infarction, hyperdensity of the MCA at an early CT scan without contrast injection suggests an occlusive mechanism and massive infarction with poor clinical outcome.
报告了5例大脑中动脉（MCA）供血区梗死病例。这5例的共同主要特征是，在发病最初24小时内，未注射造影剂的CT显示同侧MCA自发高密度影。1例血管造影显示这种高密度影与闭塞有关。另外2例经多普勒检查显示颈内动脉闭塞。强调了这些影像学表现的短暂性。在梗死急性期，早期未注射造影剂的CT显示MCA高密度影提示为闭塞机制及大面积梗死，临床预后较差。
