Comparative study of the pressure and the resistance to slippage of several aneurysm clips was done. Knowledge of the physical characteristics of various clips, such as the pressure, maximum opening angle, and width and thickness of the blade is essential for their proper use.
Background and Purpose Pyramidal tract Wallerian degeneration has been detected on magnetic resonance imaging (MRI) as T 2 -weighted high-intensity areas. We analyzed the relation between the extent of brain stem Wallerian degeneration and activities of daily living (ADL) after supratentorial hemorrhagic stroke.Methods Twenty-six patients with supratentorial hemorrhage were examined on the coronal T 2 -weighted image of the pons 3 months or later after stroke, and the percentage of Wallerian degeneration in the pons was calculated. The patients were divided into three groups. In group A (n=6), MR films were taken 3 to 6 months from the onset, and the ADL assessment was done within 2 months from the MRI. In group B (n=ll), MR films were taken 3 to 6 months from the onset, and the ADL assessment was done within 10 months from the MRI (mean, 15.5 months from the onset). In group C (n=9), MR films were taken after 10 to 17 months (mean, 12.0 months) from the ictus, and the ADL assessment was done
A 66-year-old female with a 3-year history of left trigeminal neuralgia presented with an unusual left cerebellopontine angle meningioma associated with asymptomatic syringomyelia at the C2 to C4 levels diagnosed by magnetic resonance (MR) imaging. Two months after total tumor removal, the syrin gomyelia had diminished without shunting. MR images are useful as a basis for early diagnosis of syringomyelia.
Intracranial anastomosis between the distal anterior cerebral arteries (ACA's) was performed on two patients. One patient had isolated occlusion of the proximal ACA on one side causing monoparesis in the leg, and the other patient suffered from occlusion of the internal carotid artery and a small anterior communicating artery. The weakness of the legs improved immediately after surgery and cerebral angiography revealed a good filling of the bilateral ACA's. Technical aspects and indications for the procedure are discussed.
The authors report a unique case of transient amaurosis occurring every time the patient flew in a jet plane and frequently when he drove up a mountain. X-ray examination showed dysplasia of the sphenoidal sinus and optic canals. The pathogenesis and the treatment of the amaurosis is discussed.
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