BACKGROUND AND PURPOSE Hyperperfusion syndrome is a rare but disastrous complication after carotid endarterectomy (CEA). The aim of this study was to investigate the relationship between preoperative cerebral blood flow (CBF) abnormalities and postoperative hyperperfusion through the use of statistical brain mapping analysis. METHODS For 41 patients with… (More)
We present a case of a xanthogranuloma of the lateral ventricle choroid plexus in association with focal areas of abnormal T2 signal in the tegmentum of the pons as well as within the middle cerebellar peduncles. The characteristic MR appearance of this rare entity is described along with a pathologic basis suggesting an association with posterior fossa… (More)
A 5-month-old boy presented with a rare case of intramedullary teratoma extending from T1 to S5 and associated with a lumbosacral lipoma. Magnetic resonance imaging showed the tumor extended over the lipoma. Since the tumor could not be clearly demarcated from the spinal cord, surgery was performed under a preoperative diagnosis of spinal glioma. The lack… (More)
The authors present a proved case of neurilemmoma arising from the oculomotor nerve in which MR imaging, including enhancement by gadopentetate dimeglumine, dynamic study and three-dimensional gradient echo images, provided much more precise definition of the tumor.
Successful removal of a meningioma arising from the confluens sinuum is described. This tumor extended multidirectionally through the venous sinuses (superior sagittal sinus, bilateral transverse sinuses, straight sinus, and occipital sinus) and protruded like a club in nodular pattern from the left inner surface of the confluens sinuum into the left… (More)
Nine cases with hyponatremia were precisely examined during the past 2 years. Seven of them showed normal plasma volume, serum aldosterone and pituitary function, although ADH was detected. Therefore, those seven cases were diagnosed without dilutional hyponatremia due to SIADH (a syndrome of inappropriate secretion of antidiuretic hormone). The mechanism… (More)
The plasma volume, central venous pressure and water balance of 24 patients were measured around the 1st and 2nd week after early operations for ruptured aneurysms. All of the patients had been successfully treated by induced hypertension therapy for delayed vasospasm. Plasma volume was measured by the RI method using RISA. The average plasma volume of 16… (More)