Tsunemaro Koyama

Internal carotid aneurysm associated with multiple anomalies of cerebral arteries

SummaryAn unusual case of the extradural internal carotid artery aneurysm associated with the abnormal course of the anterior cerebral artery and other multiple anomalies of the cerebral arteries was presented. In addition, a high position and a coarctation of the aortic arch and a hypoplasia of the left subclavian artery were demonstrated by angiography, but the vertebro-basilar system was essentially normal.RésuméPrésentation dun cas inhabituel danévrisme de lartère carotide interne extradurale avec trajet anormal de lartère cérébrale antérieure et diverses anomalies des artères cérébrales. Langiographie revéla en outre la position haute et la coarctation de la crosse de laorte et lhypoplasie de lartère sous-clavière gauche, mais le système vertébro-basilaire était normal.ZusammenfassungFallbericht über einen Patienten mit einem Aneurysma der Arteria carotis interna und zusätzlichen multiplen Anomalien der Hirnarterien.

Ruptured aneurysm of an azygos anterior cerebral artery

SummaryA ruptured saccular aneurysm of the azygos pericallosal artery was found and clipped successfully in a woman of 47 years. Aneurysm of an azygos pericallosal artery is extremely rare.

Interhemispheric subdural empyema with an enlarged tentorial artery and vein

SummaryA case of isolated interhemispheric subdural empyema, with an angiographically enlarged tentorial artery and vein, is reported.RésuméLes auteurs rapportent un cas dempyème interhémisphérique sous-dural isolé avec dilatation de lartère et de la veine tentorielle à langiographie.ZusammenfassungFallbericht eines 14 Jahre alten Mädchens mit einem Empyem im Interhemisphärenspalt. Das Empyem reichte bis zum Falx-Tentorium-Winkel. Im Angiogramm zeigte sich eine erweiterte A. und V. tentorii.

Occipito-Vertebral Anastomosis; Its Clinical Significance

A patient with an occipito-vertebral anastomosis associated with interesting clinical symptoms is presented. This 38-year-old male had a history of recurrent and reversible ischemic episodes of the vertebro-basilar system for more than 10 years. Surgical obliteration of this abnormal anastomotic channel resulted in gradual improvement of most of his clinical symptoms. The steal phenomenon of blood supply from the vertebro-basilar system to the external carotid artery via the anastomotic channel was thought to be responsible for clinical symptoms.