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Importance of magnetic resonance in Parkinson disease. An analytic study of the...

The authors have studied by high field MR (Signa 1.5 T, GE) 11 patients with known Parkinson's disease and 19 normal controls. In all cases the widths of the pars compacta were measured by optical densitometry in T2-weighted images (gradient-echo TR 2600, TE 80). In Parkinson's patients the compactae of the nigra were found to be significantly thinned (p less than 0.01) which may be of importance for the discus...

Contribution of angiography in the pre-operative evaluation of 24 jugulo-tympan...

The contribution of carotid and vertebral angiography for surgical planning, particularly for the infratemporal approach, in 24 jugulotympanic paragangliomas with otoneurological symptoms is discussed. These symptoms included peripheral facial palsy, sensorineural hypoacusis, labyrinthine and nervous syndrome of the jugular foramen. Angiography was essential for the diagnosis of these tumors and, above all, for...

Development of the embolization technique for cerebral and spinal marrow arteri...

The authors revised 4 cases of large AVM's--3 cerebral and 1 medullary--illustrating the evolution of their technique of endovascular occlusion. These embolizations always preceding the surgery have their interest discussed in terms of the clinical grounds, the easiest access to the nidus and the possibilities of preventing some of the surgical risks. ; The authors revised 4 cases of large AVM's--3 cerebral an...

The foramen rotundum artery--angiographic characterization and clinical signifi...

The application of the endovascular prosthesis (stent).

We report two cases of symptomatic internal carotid stenosis treated by vasoplasty and stent placement in two male patients aged 57 and 64 years, one who had been suffering from transient ischemic events and the other had had a recent cerebral infarction with hemiparesis. The treatment sessions took place without complications. We discuss the choice of simultaneous vasoplasty and stent placement, some of the cu...

CT (high-resolution) in 60 cases of stapediovestibular otosclerosis with surgic...

Sixty patients with stapediovestibular otosclerosis (OEV) were studied by CT-scan (target program). These patients had stapedectomy indication because they had a conductive hearing loss in which one had an A/B gap of > 25 dB. The leading principle of this study was how to know the main indications of the CT-scan which makes it possible for morphologic and densitometric evaluation of the extension and probable a...

The radiological pattern of cochlear otosclerosis. A CT study of 14 patients.

In this review of cochlear otosclerosis 14 cases were studied by CT scan aiming to establish a densitometric pattern of the capsular foci and relating it to the hearing and vestibule dysfunctions. Severe demineralization with characteristics of probable activity (increased lucency of 30-40%) was demonstrated in the capsular foci. These were mainly cochlear with endosteal involvement (93%): large (64%) or discre...

Estudo por tc de 17 casos de anomalia congénita coclear. Tentativa de relação e...

In this review of cochlear malformations, 17 cases were studied by CT scan (high resolution-target program) including 10 males and 7 females. The anomaly was bilateral in 12 cases and unilateral in 7 (the latter included 2 Mondini type aplasias and one Michel). The cochlear malformation (whose most frequent expression was the cochlear hypoplasia with 1 or 1 1/2 spires-65% of the cases) was associated to semicir...

Angiographic diagnosis of intracranial aneurysms: study of the experience of th...

In this work, 139 intra-cranial aneurysms diagnosed at the Egas Moniz Hospital were studied, from 1980 to the first quarter of 1992. The nature of this type of lesions was discussed, and aneurysms were defined as an abnormal and segmental dilatation of an intracranial artery wall. A statistical study was performed, including 67 cases after selection, corresponding to 71 aneurysms. Of these, 39% originated from ...

A case of Wilson's disease studied using magnetic resonance: a new approach?.

Wilson's disease is a genetically determined disorder of copper metabolism with increased deposition in brain and liver. With current imaging techniques--CT scan and conventional Nuclear Magnetic Resonance (NMR)--it has been possible to demonstrate oedema, neuronal loss and reactive gliosis, but not copper deposition. In the present study we report the observations, done in one patient, using a new high magneti...