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Biomedical subjects

P Farnarier

Publications and source records attributed to P Farnarier.

17 recordsLinked to original sources
PubMed1992

[Paralytic pontine exotropia disclosing endocarditis].

A case of bacterial endocarditis complicated by paralytic pontine exotropia is reported. Magnetic resonance imaging clearly showed a rostral lesion of the paramedial pontine reticular formation and the medial longitudinal fasciculus. The occurrence of paralytic pontine exotropia is suggestive of ischaemia, and patients with this so-called "one-and-a-half syndrome" associated with signs of infection should be investigated for endocarditis.

Brain Ischemia↗
PubMed1992

Value of MRI in the morphological evaluation of tumors of the third ventricle.

The detection or suspicion of a tumoral expansive process in the third ventricule is usually performed by MRI. The contribution of MRI to the diagnosis is unquestionable in view of its accuracy in the topographical characterization of these lesions and in the detection of small formations. The great histological variety of tumours in that region may result in different treatments which can be associated. MRI, therefore, plays an important role in pretherapeutic morphological evaluation. Fifteen patients with tumour of the third ventricle were examined by MRI before treatment. The results of these examinations were compared with the pathological data and the therapeutic procedures: ventricular shunting, stereotactic needle biopsy, radio- or chemotherapy and surgery. MRI cannot provide a formal histological characterization, but it can individualise some categories of tumours, give details on the walls of the third ventricle (notably in the case of bifocal pineal and suprassellar lesions), visualize the paths of CSF flow and predict the need for cisternoventriculostomy, and detect venous structures in the vicinity of the great cerebral vein which might result in post-biopsy and post-surgery complications.

Adolescent↗
PubMed1991

[Hemichorea in acquired immunodeficiency syndrome. Toxoplasmosis abscess in the striatum].

Three HIV seropositive patients presented with cerebral toxoplasmosis which was treated by anti-infectious agents. After partial improvement, they developed hemichorea related to striatal infectious lesions. In AIDS patients with cerebral toxoplasmosis, autopsy series have reported a high incidence of basal ganglia abscesses, explaining the occurrence of involuntary movements such as hemichorea.

Acquired Immunodeficiency Syndrome↗
PubMed1990

[Colloid cysts of the third cerebral ventricle. Computed x-ray tomography, MRI and stereotaxic puncture. Apropos of 9 cases].

The authors report their experience with Colloid Cysts of the third ventricle (9 cases treated between 1983 and 1989). Eight of them were punctured using stereotactic approach; five cysts were completely evacuated and the patients are free of recurrence. In three cases, tapping was impossible or the cyst insufficiently evacuated and the patients were secondary operated on (open microsurgical approach). The last case was directly operated on. Colloid cysts cured by stereotactic puncture were all hypo or iso-dense at C.T. scan and had a diameter of more than 1 cm. All these cases have had a M.R.I. exploration and the image of the cyst was always the same increased T1 and T2 signal. Unfortunately, we did not have the opportunity to realize M.R.I. in colloid cysts of a small size and hyperdense at C.T. scan. These results can help to the indication of a stereotactic puncture at the first attempt in some well defined colloid cysts.

Adolescent↗
PubMed1979

Correlative study between computerized transverse scanning and stereoimpedoencephalography in space-occupying lesions of the brain.

Stereoimpedoencephalography (SIEG) is routinely used by the authors during stereotactic investigations of glial brain tumours prior to stereotactic implantation of isotopes or prior to conventional surgery: the brain tissue impedance is measured along a probe track according to the four electrodes impedance technique. The correlation between the tissue structures and the corresponding impedance values has been studied by comparison with the CATScan data reported on the stereotactic schedules; impedance values are influenced by changes in arterial pCO2 and also by other unknown factors; in order to avoid these uninterpretable changes of the impedance, the recorded values have been normalized with respect to the average impedance along a control track in the normal hemisphere. As a rule, the impedance profile exhibits a "hole" at the site of the pathological processes like tumours as well as surrounding oedema, and the delimitation of the pathological area is very similar to that obtained by the CATScan. There is a good linear correlation between the values of normalized impedance and the x-ray absorption as given by the computer listing of the CATScan. Lastly, statistical values of normalized impedances are determined for the main structures of the brain, showing that the tumour tissue has an impedance equal to half the impedance of the normal tissue.

Brain Neoplasms↗
PubMed1977

[Surgical results in prolactin-secreting pituitary adenomas (a propos of 40 personal observations)].

The authors present a serie of 40 histologically verified prolactin secreting adenomas. Thirty-four women and six men were explored using the usual techniques and operated by the transphenoidal approach with biological follow-up 3, 6 and 12 months post-operatively. Results were a function of tumor size and invasive potential. Although amelioration of the tumoral syndrome always resulted, fonctional and biological normalization were inconstant. Complementary anti-prolactin treatment (C.B. 154) was begun in the non-normalized patients, especially in the cases of invasive adenoma. --Normalization was achieved in 95% of enclosed adenomas, --In 61% of invasion adenomas. In those patients normalized following surgery a return to normal rythmic prolactin secretion was observed.

Adenoma↗
PubMed1976

[Study of epilepsy by computer controlled transverse axial tomography of the brain].

The value of computerized azial tomography of the encephalon is considered:--Firstly, in relation to the different electro-clinical varieties of epilepsy (essentially primary, secondary and partial) where it provides information of a high degree of precision concerning the topography, frequency and size of morphological abnormalties of the encephalon.--Secondly, in relation to the various aetiological possibilities (tumour, post-traumatic, post-ischaemic, post-infective, et cetera). This new method is of considerable to specify an aetiology almost unknown up to the present time: post-ischaemic occipital porencephaly secondary to perinatal or infantile occlusion of the posterior cerebral artery.

Adult↗
PubMed1975

[Angiographic study of cerebral convolutions and their area of vascularization].

The authors demonstrate the facility with which the principal fissures and sulci of the brain can be angiographically localized by reference to characteristic loops and bends in the courses of the branches of the anterior, middle, and posterior cerebral arteries. The study is based upon dissections of 150 human brains in which the arteries of interest were selectively injected. A propos to this anatomic-angiographic correlation the authors also describe the vascular territories of each cortical branch and propose a simple procedure for the evaluation of these territories during cerebral angiography.

Brain↗
PubMed1975

[Tension-volume relationship of the wall of the isolated right ventricle].

The variations of tension on the wall of the isolated right verticle have been observed on 18 dogs. The Tension/Volume curve we got can be superimposed to that obtained by pressures. The wall of the right ventricle itself (the radius of the curve in the cavity and the wall-thickness) seems to vary only with the changes in its tension in a rather small part of the curve.

Animals↗
PubMedDate not supplied

Embolization of an intraparotid false aneurysm of the external carotid artery: case report.

A case of posttraumatic false aneurysm of the terminal part of the main external carotid artery involving the entire parotid gland is presented. Embolization with two microcoils allowed immediate thrombosis of the false aneurysm. The lumen of the external carotid artery remained open. Facial paralysis resolved. The atypical clinical presentation and the therapeutic steps in such a case are described.

Aneurysm↗
PubMedDate not supplied

[Preoperative approach to the histologic diagnosis of cerebral tumors by combination of clinical and paraclinical examinations (EEG, computerized cerebral tomography, scintigraphy, and angiography)].

The authors present their last series of one hundred operated cerebral tumors (19 meningiomas, 16 benign gliomas, 38 malignant gliomas, 20 isolated metastasis, 8 diversified tumors) studied on the clinical, E.E.G., isotopic scanner, computorized tomographies and angiographic point of view. The comparison of these multiple exams, permits one to determinate the malignant of benign nature of a tumor in 86 p. 100 of the cases and the precise histological nature in 56 p. 100 of the cases. The biopsy effectuated in stereotaxic conditions permits to solve the problem in uncertain cases. The interest of computorized tomography is emphasized (discovery or confirmation of a suspected tumor, definition of its extension in depth), but this recent technic is incapable of constant confirmation of the histological diagnosis; it cannot replace other confirmed methods of diagnosis. The angiography remains necessary to guide the surgical gesture.

Brain Neoplasms↗