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OBJECTIVE Several surgical approaches have been proposed for the treatment of colloid cysts, which still remains controversial. The most recent technique used is endoscopy. By its nature, endoscopy cannot offer complete removal, as compared to microsurgical techniques, but can do more than puncture. To evaluate the usefulness of endoscopy for colloid cyst(More)
Idiopathic stenosis of the foramina of Magendie and Luschka is a rare cause of obstructive hydrocephalus involving the four ventricles. Like other causes of noncommunicating hydrocephalus, it can be treated with endoscopic third ventriculostomy (ETV). Three patients who were 21, 53, and 68 years of age presented with either headaches (isolated or associated(More)
BACKGROUND AND PURPOSE We describe four cases of aneurysmal rupture during embolization with Guglielmi electrodetachable coils (GDCs) in an attempt to identify those aneurysms whose rupture during embolization represents a life-threatening risk; our emphasis is on emergency management, in particular, ventriculostomy. METHODS Medical records were reviewed(More)
OBJECT The aim of this study was to reassess whether middle cerebral artery blood flow velocity (MCAv) variations measured by transcranial Doppler ultrasonography during acute PaCO2 manipulation adequately reflect cerebral blood flow (CBF) changes in patients with severe closed head injury. METHODS The study was performed by comparing MCAv variations to(More)
  • E Melon
  • 1999
The exact mechanism of vasospasm is still unknown. The etiology of cerebral vasospasm is subarachnoid blood clot. Vasospasm is a multifactorial process. Oxyhemoglobin is released by erythrocyte lysis and exert several effects on the endothelium that could lead to vasoconstriction. The production of free radical and superoxide anion radical secondary to(More)
A new device, modified from the Nucleotome (Surgical Dynamics, Alameda, CA), was used for stereotactic aspiration of deep brain hematomas. Real-time monitoring by computed tomography allows a very safe procedure, and the risk of aspirating the surrounding brain is avoided. The technique was applied in 13 cases of deep brain hematomas. The intraoperative(More)
A case involving the absence of the midthird portion of the basilar artery (BA) associated with a ruptured fusiform aneurysm of the superior third of the basilar artery discovered after a subarachnoid hemorrhage is reported. Surgical clipping was precluded by the anatomical conditions. The aneurysm was treated by occlusion (surgical clipping and balloon(More)
Prognosis in a homogeneous series of 96 cases of non-traumatic cerebral hemorrhage admitted to a neurosurgical department within 6 to 24 hours of onset was assessed by studying possible correlations between clinical condition (grade I: conscious; grade II: somnolent; grade III: comatose; grade IV: comatose with signs of brain stem involvement) and computed(More)
The diagnosis of transtentorial brain herniation has long relied on encephalography, then arteriography. Computerized tomography (CT) is a safer method which permits a more precise and earlier visualization of temporal and central herniations and herniation of the culmen cerebelli, which are the three varieties of transtentorial herniation. In an attempt to(More)