[Spontaneous and surgical extra-intracranial anastomosis following bilateral occlusion of the internal carotid artery].

A report is given on a case of bilateral carotid occlusion in which on one side a sufficient blood supply of the right hemisphere developed spontaneously via extra-intra-cranial anastomoses. On the opposite side, after proving an insufficient blood supply, an extraintracranial arterial bypass between the parietal branch of the A. temporalis superficialis and the cortical A. angularis was established micro-neurosurgically. The result was a reperfusion of the left aspect of the media and a clinical improvement of the neurological symptoms.