Search PubMed⌕ Search

Biomedical subjects

J Chiras

Publications and source records attributed to J Chiras.

At least 181 records · Page 10Linked to original sources
PubMed1978

[CT scan in Wilson's disease (author's transl)].

We studied nine cases of Wilson's disease on CT scan. In all patients we found cerebral atrophy. In five patients without neurological symptoms we found no specific signs. In the four patients with neurological symptoms we found lenticular caudate nucleus or thalamic areas of hypodensity.

Brain↗
PubMedDate not supplied

Spontaneous dissecting aneurysms of the internal carotid and vertebral arteries--two case reports.

Two patients had acute spontaneous dissection of both internal carotid arteries and of one or both vertebral arteries. One had angiographic signs suggestive of fibro-muscular dysplasia and both were on oral contraceptives. They were treated with high dose heparin and made a good clinical recovery. A digital intravenous angiography performed two to three months later showed a complete recanalization of arteries involved. These patients are similar to those reported as "idiopathic regressing arteriopathy" and "reversible angiopathy" which probably correspond to the same entity.

Acute Disease↗
PubMedDate not supplied

Cerebral venous thrombosis--a review of 38 cases.

A series of 38 patients with angiographically proven cerebral venous thrombosis (CVT) affecting dural sinuses is reported. This study shows that CVT is not rare, that the clinical diagnosis is extremely difficult because of the variable modes of onset and groupings of symptoms, that most CT findings are non specific and that angiography remains the best diagnostic tool. Only 4 patients died, which suggests a more benign outcome than classically described. None of the 23 heparin treated patients died, which indicates that anticoagulants were not harmful in this series.

Adult↗
PubMedDate not supplied

Stroke, migraine and intracranial aneurysm: a case report.

A man had since childhood recurrent attacks typical of ophthalmic migraine. After an otherwise unremarkable attack, he was left with a permanent quadrantanopsia due to a right occipital infarct. The remarkable pattern of progression, which characterized the visual phenomenon of subsequent attacks, favours a primary neuronal phenomenon. The first angiography revealed an occlusion of the posterior cerebral artery (PCA) but the second one, performed two years later, disclosed a PCA aneurysm. Such a finding emphasizes the need of thorough and repeated evaluations of patients with so-called "migrainous infarcts."

Adult↗
PubMedDate not supplied

Dural arteriovenous fistulas of the posterior fossa draining into subarachnoid veins.

PURPOSE: To describe the clinical presentation, angioarchitecture, and risks and problems of therapy in patients with dural arteriovenous malformations of the posterior fossa draining into subarachnoid veins. PATIENTS AND METHODS: Twelve patients with dural arteriovenous malformations of the posterior fossa draining into subarachnoid veins were studied. RESULTS: These fistulas often presented with intracranial hemorrhage (eight cases) and myelopathy (two cases). They were located in the tentorium (six cases) or at the skull base (six cases). The arterial supply was provided by branches of the external carotid artery (nine cases), by the posterior meningeal branch of the vertebral artery (nine cases), and by the meningohypophyseal trunk (three cases). The fistulas drained directly into a cortical vein (six cases) or into a venous lake (six cases). In two cases, perimedullary draining veins were observed. The treatment modalities were endovascular embolization alone (two cases), surgery alone (five cases), and embolization followed by surgery (three cases). Despite the treatment, four patients died; in two cases, intracranial hemorrhage recurred. CONCLUSIONS: Subtotal occlusion of a fistula by surgery or embolization alone is not protective against further complications, especially hemorrhage. The goal of treatment is to achieve a rapid and complete anatomical cure; combined endovascular and neurosurgical treatment seems to be the therapeutic choice.

Adult↗
PubMedDate not supplied

[Ischemic accident caused by thrombosis of a venous angioma. Apropos of a case].

Authors report one case of cerebral ischemic accident by thrombosis of a venous angioma of brain. This kind of malformation is quite unusual and was considered by most authors as unable to involve supratentorial ischemic complications. This case seems to be the first reported in the literature and demonstrates that venous brain ischemic accidents can result from venous angioma of the brain.

Adult↗
PubMedDate not supplied

[Angiodysplasia or vascular malformations of the cervical spine (author's transl)].

Following exploration by angiography , 45 patients with cervical spine malformations ( out of 220 cervicocephalic examinations for vascular malformations), were treated by embolization. The 45 cases included 13 facial lesions, 4 pharyngolaryngeal lesions, 2 cervical venous ectasias, 4 arteriovenous fistulae of the vertebral artery, 19 medullary lesions, and 3 pseudomalformations (hemangiopericytomas). Though embolization is difficult it is of value in definitely vascular occlusions (follow-up for 3 years), and miniaturization of catheters and balloon sounds enables very selective occlusion of vascular tumors or malformations to be carried out, micro-emboli of 30 to 500 mu have been obtained.

Arteriovenous Fistula↗
PubMedDate not supplied

[Congenital arterio-venous malformations. Long-term therapeutic effects of arterial ligatures. A plea for their abandon in favour of more recent procedures (author's transl)].

It is well known that proximal arterial ligations have no curative effect on arterio-venous malformations, unfortunately however they are still employed. The immediate and late consequences of such ligatures have been studied by analysing 36 out of 142 cases of arterio-venous malformations. These ligatures interfere with ulterior treatment. At present such a treatment relies on a combination of radio-surgical treatment associated with embolization and complete surgical excision of the malformation, whenever it is possible.

Arteries↗
PubMedDate not supplied

Comparison study of CT and positron emission tomographic data in recent cerebral infarction.

To better understand the pathophysiologic correlates of the computed tomographic (CT) scan changes seen in recent cerebral infarction, 17 patients (20 studies) underwent both x-ray transmission and positron emission CT investigations within 18 days after clinical onset of complicated ischemic stroke in the internal carotid artery territory. The density changes before and after contrast study measured within the CT lesion were correlated to the local cerebral blood flow (CBF), oxygen utilization (CMRO2), and oxygen extraction fraction (OEF) measured with the oxygen-15 steady-state positron technique. Statistically significant linear correlations were found between hypodensity and CBF, hypodensity and CMRO2, and contrast enhancement and CBF, such that the more CBF and CMRO2 were depressed, the more marked was the hypodensity; and the more CBF was elevated, the more marked was the contrast enhancement. Although marked contrast enhancement was associated with decreased OEF (luxury perfusion), it was only rarely associated with increased CBF. Various hypotheses are discussed to explain these findings.

Brain↗
PubMedDate not supplied

[Preoperative embolization in spinal pathology. Apropos of 21 cases].

Problems encountered during pre-operative embolization in 21 patients with spinal affections could be differentiated as a function of the 3 main regions affected: cervical, dorsolumbar, and lumbosacral. The distinction between the totally different problems raised was based on histologic and angiographic studies of the vascularization of the spinal cord and vertebral column. Whenever possible, and particularly when it can be complete, embolization markedly facilitates the surgical procedure.

Adult↗