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Biomedical subjects

O Al-Mefty

Publications and source records attributed to O Al-Mefty.

63 records · Page 4Linked to original sources

Neurosurgical training in the countries of the Middle East: a summary round table discussion held at the annual meeting of the Middle East Neurosurgical Society, April 1983, Athens, Greece.

At the combined Annual Meeting of the Hellenic Neurosurgical Society and the Middle East Neurosurgical Society in Athens on April 10-13, 1983, a round table discussion of neurosurgical training in the Middle East took place. The types of training programs available in the panel members' respective countries were discussed, and the quality, requirements, and standards of training were delineated. Neurosurgical manpower in the Middle East was reviewed. The panelists explored the need for unification of programs and standardization and review of training and called for a well-recognized certification in neurosurgery among the countries of the Middle East.

Education, Medical↗

Microsurgery for giant craniopharyngiomas in children.

The authors report 20 cases of giant craniopharyngioma in children operated on during the 6-year period from 1978 through 1984. The tumor size (maximal diameter) ranged from 5 to 11 cm. These patients presented with increased intracranial pressure, severe visual loss, and neurological and endocrinological deficits. Tumor growth had occurred in several directions, causing displacement of the circle of Willis, the optic apparatus, and the hypothalamus, as well as encroachment into the interpeduncular and prepontine cisterns and into the frontal, temporal, and posterior fossae. The surgical technique for total removal of these giant tumors in the last 10 cases is described. Emphasis is placed on the use of microsurgical technique during the first operation, close endocrinological follow-up, and early reevaluation by computed tomographic scanning.

Adolescent↗

Concentrations of Ag, Al, Au, Bi, Cd, Cu, Pb, Sb, and Se in cerebrospinal fluid of patients with cerebral neoplasms.

We measured the concentrations of nine trace elements in cerebrospinal fluid of 11 patients with malignant brain tumors, 11 with benign brain tumors, and 10 control patients, using flameless atomic absorption spectrophotometry. The mean and standard deviation for these concentrations (microgram/L) in the control group were 5.1 +/- 2.9 (silver), 326.6 +/- 171.2 (aluminum), 38.5 +/- 32.2 (gold), 36.6 +/- 23.7 (bismuth), 1.5 +/- 1.3 (cadmium), 39.8 +/- 24.7 (copper), 15.7 +/- 11.5 (lead), 20.9 +/- 3.8 (antimony), and 19.1 +/- 13.3 (selenium). Concentrations of silver and lead were markedly increased in patients with malignant cerebral neoplasms. The malignant-tumor/control patient concentration ratios were 2.31 for silver and 2.11 for lead. We observed no significant differences between the results for the benign tumor patients and the control group.

Adolescent↗

Suprasellar arachnoid cysts: an extension of the membrane of Liliequist.

A case of suprasellar arachnoid cyst and hydrocephalus diagnosed by computed tomography (CT) and positive-contrast ventriculography is presented. Transfrontal exploration of the 3rd ventricle revealed findings consistent with the cyst being, in fact, a large forward and upward diverticulum of the arachnoidal membrane of Liliequist. The authors suggest that some of the other similarly located arachnoid cysts are extensions of this membrane imperforate by previous infection, hemorrhage, or maldevelopment.

Arachnoid↗

Neurogenic bladder and the tethered spinal cord syndrome.

We report 2 cases of the tethered spinal cord syndrome. Early clinical detection of this syndrome in children with bladder dysfunction should be followed by diagnostic myelography and immediate surgical release of the spinal cord. The pathophysiology of the syndrome is discussed.

Child↗

Communicating hydrocephalus as a cause of aqueductal stenosis.

Eleven cases of presumed aqueductal stenosis with onset of symptoms after the first decade were reviewed. Ten patients had complete occlusion and one a high-grade stenosis. In 10, the dilated lateral ventricles caused a marked inferior displacement of the third ventricle. Postshunting diagnostic studies on six of these patients revealed ascent of the third ventricle, and in three of these the aqueduct was shown to be patent. It appears that in some cases of advanced communicating hydrocephalus the descending third ventricle kinks or pinches shut the aqueduct, adding an obstructive component which accelerates the clinical picture. The mechanism and clinical features of this process are discussed.

Adolescent↗

Embolization of an arteriovenous malformation of the brain stem.

A case of complete or nearly complete obliteration of a brain stem arteriovenous malformation by embolization is presented. At the termination of the final angiogram the patient bled into the midbrain and died. The reasons for this complication are unknown.

Adolescent↗

The aberrant jugular bulb.

The aberrant jugular bulb has been found in 0.5-7.0% of autopsy cases. Its primary interest lies in the appreciation of its benignancy, its occasional symptomatic behavior and of the consequences of failing to glean its true nature of surgery. Therefore, the importance of proper preoperative diagnostic evaluation must be stressed so that operative interference with an anomalous but otherwise normal structure can be avoided.

Adult↗