PubMed Health⌕ Search

Biomedical subjects

J N Taptas

Publications and source records attributed to J N Taptas.

At least 19 recordsLinked to original sources
PubMed1990

[The parasellar osteo-dural chamber and the vascular and neural elements that traverse it. An anatomical concept that would replace the cavernous sinus of classical anatomy].

On each side of the sella turcica, because of the existence of vascular and nervous elements, the two aspects of the parasellar segment of the tentorium cerebelli diverge and with the wall of the sphenoid bone form an extradural lodge. In this space are included a venous pathway (the cavernous sinus of the classics), the internal carotid artery and the three oculo-motor cranial nerves. The venous pathway is a plexus of small sized veins, mainly draining the orbital blood, and has neighborhood relations with the carotid. The morphology of the region and the relations of the internal carotid artery and the cranial nerves with the dura propria are the result of the embryonnic development of the brain and the formation of the anterior and middle cerebral fossae. In the parasellar space the cranial nerves have a dural sheath as well as a leptomeningeal one. Nerves III and IV are very close to the lateral wall explaining its multilayered aspect. The internal carotid artery, extradural in its parasellar segment, at the level of the anterior clinoid process, is involved by dura propria to become intradural (the artery does not pierce the dura). Because of the adhesion of the dura propria to the intracranial periosteum the artery is attached to the bone whereas in its extradural and intradural segments it has some mobility. Recent studies have confirmed and completed this topographical concept, first presented in 1949, allowing successful approaches to vascular and tumorous lesions considered inoperable.

Abducens Nerve↗
PubMed1985

[Diffuse intracranial arterectasias: megadolichocarotids, megadolichovertebrals].

Intracranial diffuse arteriectasis may be located to the carotid and vertebral arteries and their branches separately or concomitantly and associated with saccular aneurysms and generalized arteriectasis. The principle clinical aspects of intracranial arteriectasis are cranial nerve palsies, particularly of the cerebellopontine region in association or not with cerebellar disorders and transient or permanent motor deficiencies. Arterial hypertension exists in a high proportion of cases. The some times complex clinical picture may be due to pressure of nervous structures by the ectatic vessels, ischemia or hemorrhagy. Mostly affected are men over 50 years of age although arteriectasis has been observed in younger patients including children and infants. The disease can be suspected clinically but is generally diagnosed after neuroradiological studies, mostly angiography and/or computerized tomography. Initially arteriectasis was supposed to be the result of arteriosclerosis but histopathology has shown that it may be independent of arteriosclerosis and appears to be the result of a congenital abnormality in the elastic component of the vessel wall. On the basis of our six observations and those already published it becomes apparent that diffuse intracranial arteriectasis represents a specific disease.

Adult↗
PubMed1983

[Posttraumatic carotid-petrosal arteriovenous fistula].

Exclusive petrosal drainage of traumatic parasellar fistulae is uncommon (carotid-petrosal fistula). In the reported case successful treatment was achieved by muscle embolization and ligature of the ipsilateral internal and external carotid arteries.

Adult↗
PubMed1982

The so-called cavernous sinus: a review of the controversy and its implications for neurosurgeons.

The so-called cavernous sinus is a venous pathway, an irregular network of veins that is part of the extradural venous network of the base of the skull, not a trabeculated venous channel. This venous pathway, the internal carotid artery, and the oculomotor cranial nerves cross the medial portion of the middle cranial fossa in an extradural space formed on each side of the sella turcica by the diverging aspects of a dural fold. In this space the venous pathway has only neighborhood relations with the internal carotid artery and the cranial nerves. The space itself must be distinguished from the vascular and nervous elements that it contains. The revision of the anatomy of this region has not only theoretical interest but also important clinical implications.

Carotid Artery, Internal↗
PubMed1981

[The intracranial course of the internal carotid artery. Anatomical features. Clinical implications (author's transl)].

The intracranial course of the internal carotid artery has a number of special clinical features by virtue of its relations with the dura mater, the venous pathway lateral to the sella turcica known as the cavernous sinus and the oculomotor and, to a lesser degree, trigeminal cranial nerves. Knowledge of these anatomical features, which differ in several aspects from classical concepts, is not only of descriptive but also clinical interest.

Brain↗
PubMed1979

[Orbital and intracranial complications of paranasal osteomata (author's transl)].

Osteomata of the paranasal frontal and ethmoidal sinuses are benign, slow growing tumors generally asymptomatic. Complications due to orbital or intracranial development of the osteoma are rare and demand neurosurgical treatment. The authors report two cases. In the first a fronto-ethmoidal osteoma first caused exophtalmos and later ophtalmoplegia due to compression of the superior ophtalmic vein. In the second case the posterior development of an osteoma of the frontal sinus resulted in pneumocephalus with epileptic fits and headache and initially homolateral hemiparesis. In both cases CT Scan showed the extent of the osteoma and in the second case the gap in the wall of the sinus. Both osteomata were radically removed through frontal craniectomy. The literature is reviewed, 12 other cases of pneumocephalus due to posterior development of paranasal osteomata have been published during the last 50 years.

Adult↗
PubMed1978

[Tumoral forms of tuberous sclerosis. The clinical and therapeutic importance of concomitant hydrocephalus (author's transl)].

In a young man and a pregnant young woman presenting since childhood of tuberous sclerosis without epilepsy or mental disorders severe intracranial hypertension developped secondary to obstructive hydrocephalus. Ventriculo-peritoneal shunting unilateral in the first case, bilateral in the second, releaved the patients of all their symptoms. Angiographic studies in both cases showed the existence of extracerebral visceral lesions. After a short review of similar published cases and the proposed treatments the authors suggest as only treatment a shunting procedure without attempt of removal of intracerebral nodules.

Adult↗
PubMed1978

[Angioscintigraphy of the aortic arch and the origin of the cerebral vessels in cerebro-vascular diseases (author's transl)].

Gamma-angioscintigraphy of the cerebral vessels starting from the aortic arch localises better the level of an eventual vascular lesion preventing a "false positive" aspect, possible by the usual technique as in the case reported. By starting the examination at the level of the aortic arch or by the use of a diverging collimator it is easy to decide of the necessity of an angiographic study, simple carotidography or angiography of the aortic arch and its branches.

Aorta, Thoracic↗
PubMed1978

[Compression and obstruction of the internal carotid artery by sellar and parasellar tumors].

It is classicaly admitted that the intracranial internal carotid artery after a first intracavernous segment, becomes intra-dural by perforating or passing through the dura. Since 1949, the first of us has refuted this conception as well as that of the artery floating in the venious blood of the cavernous sinus and has described to so-called cavernous sinus as a latero-seller extradural space into which the artery has but neighbourhood relationship with a venous plexus. During embryonic development the internal carotid artery is englobed by the dura which differentiates around the cerebral vessels. At a later stage, owing to the adhesion of the dural leaf to the intracranial periosteum, the internal carotid artery becomes closely attached to the bone at the level of the base of the anterior clinoid process. This explains that tumors developping in the sellar and parasellar region may compress or obstruct the carotid artery at this level causing neurologic symptoms of ischemic origin. Three similar cases are reported, a glioma of the optic nerve, an adenoma of the hypophysis and meningioma of the sphenoidal wing.

Adult↗
PubMed1977

[Hormone therapy in the treatment of primary brain tumors of the adult].

After considering the principle effects of corticosteroids on human fluids and tissues their action in the treatment of cerebral tumors is reviewed. Corticosteroids have a definite effect on cerebral and intra-tumoral edema and thus help to restore local circulation as well as C.S.F. circulation. Through these effects they diminish intracranial hypertension and reduce clinical symptoms to those of the tumor itself. They increase the time necessary for neuro-radiologic, isotopic and other investigations and make them safer, they diminish the surgical and and post-operative risks as well as those of radiotherapy. Their action on the growth of cerebral tumors remains incertain and increased survival in patients with inoperable or recurrent malignant gliomas may be due to their anti-edema effect more than to an antitumor action which remains to be determined.

Adrenal Cortex Hormones↗