Dissecting and fusiform aneurysms of vertebro-basilar systems. MR imaging.
The magnetic resonance (MR) findings of three cases with vertebro-basilar dissecting aneurysms (DA) were compared with those of two cases with vertebro-basilar fusiform aneurysms (FA). No abnormal findings, excepting a dilatation of a signal-void area corresponding to the arterial blood flow, were shown on the MR images in the patients with a FA. In contrast to the FA cases, various abnormalities were detected by the MR studies in all three DA cases. An intimal flap and a double lumen were demonstrated in one case. An intra-mural hematoma was shown in one case. A hematoma neighboring the parent artery was demonstrated in two cases. MR imaging was thought to be useful for detecting intracranial vascular lesions, such as a DA, and for discriminating between a DA and a FA.
Iwama
T
T
Department of Neurosurgery, Gifu University School of Medicine, Japan.
Andoh
T
T
Sakai
N
N
Iwata
T
T
Hirata
T
T
Yamada
H
H
D000328:Adult; D000368:Aged; D000784:Aortic Dissection / Q000175:diagnosis* / Q000000981:diagnostic imaging; D001488:Basilar Artery / Q000000981:diagnostic imaging; D002533:Cerebral Angiography; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D014711:Vertebral Artery / Q000000981:diagnostic imaging