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J C Peragut

Publications and source records attributed to J C Peragut.

At least 55 records · Page 3Linked to original sources
PubMed1990

[Neurologic complications of osteoporotic vertebral compression. 3 new cases and critical analysis of the literature].

Three new cases of neurological complication by osteoporotic compression are reported. They are: a medullar compression by compression of D12 in a 66 year old woman, a deficient cruralgia by compression of L1 in a 67 year old man, and another deficient cruralgia due to the compression of L3 and L4 in a 55 year old woman. The literature presents 16 cases of neurological compressions by vertebral compressions attributed to the osteoporosis: two in 1958, and the others as from 1987. The only recently recognized feature of these complications can be explained by the axiom according to which "there are no neurological complications in the course of osteoporotic compressions" and by the introduction of new diagnosis techniques. However, the critical analysis of the published cases enables us to retain only 11 indisputable cases which, with our three observations, allows us to define certain features: the osteoporosis does not have any particularity compared to the uncomplicated form; the dorsolumbar junction is preferentially affected; the neurological complication occurs progressively and belatedly; the usual mechanism is the recoil of one of posterior vertebral corners, different from the globally convex bulging of tumoral compressions: it could be an element of the differential diagnosis. The surgical treatment gives better results.

Aged↗
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↗
PubMed1989

Anterior discectomy without fusion for treatment of cervical lateral soft disc extrusion: a follow-up of 120 cases.

One hundred and twenty patients with soft lateral disc herniation underwent surgery by anterior microsurgical discectomy and routine ablation of the posterior longitudinal ligament between 1976 and 1986. The study excluded patients with hard discs and soft disc extrusion with medullary symptoms. In our series 76.6% of patients were men. In 64% of the patients no causative factor was found. All of the patients presented with cervicobrachialgia; 53% also had a motor deficit. In 91.7% a single disc was involved. The last 40 cases were evaluated by computed tomography alone. In 51.5% an extruded disc was found. No permanent postoperative complication was encountered. All patients returned to their previous activities. Fifty patients underwent follow-up radiological evaluation at 1 and 5 years after the intervention and vertebral fusion was observed in 70% of these.

Adult↗
PubMed1989

[Materials for osteo-dural reconstruction in the cranium. An update].

Materials available for repair of a bony or dural defect at the cranial level are reviewed with particular attention stressed on their qualities and drawbacks for neurosurgical purposes. These materials include autologous or heterologous bone graft and biologically stable or biodegradable implants. No material can demonstrate ideal qualities of biocompatibility and biofunctionality. It should be either perfectly stable biologically and inert or perfectly biodegradable allowing simultaneous new bone reconstruction; moreover, it should be sterilizable, disposable, easy to handle and of low cost. Autologous grafts (iliac bone, split bone flap, pericranium...) have the best features but irradiated heterologous bone can be used instead; the latter needs a particular organization (bone graft bank) to fill the strict conditions of safety, especially regarding the risks of virus transmission. Implants have more recently been developed (acrylic, coral, B.O.P., ceramic, collagen-vicryl...) and present some drawbacks: generally high cost and not well established or insufficient biological properties. The experience of French neurosurgeons is reported from a questionnaire (102 answers) on the most frequently used materials. Autologous bone grafts, and acrylic as bone substitutes and pericranium for dural repair are preferentially used. Some materials, including coral, B.O.P. and collagen-vicryl, have a decreasing utilisation because of poor results especially with regards to bone incorporation and water tightness. Particular techniques (acrylic + teflon, acrylic with pre-op external casting and even non-repair of bone defects) are proposed by some neurosurgeons. New materials still under experimentation are finally presented (lyophilized bovine pericardium, collagen IV, polylactic acid).

Biocompatible Materials↗
PubMed1988

Stereotactic biopsy and treatment of brain stem lesions: combined study of 33 cases (Bologna-Marseille).

Intraaxial brain stem tumours are rarely treated by open surgical technique. In Bologna and Marseille, 23 and 10 stereotactic biopsies respectively were performed in patients with brain stem mass lesions. The mortality due to biopsy was 3% (1 pat.); while the morbidity was temporary in 6 cases (18%) and permanent in one patient (3%). The approach to the brain stem was via a frontal burr hole. 7 times, after biopsy and histological diagnosis, radioisotope implant of the neoplasm was performed with 125I (iodine). From the histological diagnoses of the lesions the following was found: only 40% of the young patients had highly malignant tumours; 83% of the adults had neoplasms (not all of the malignant type), while 17% of the verified lesions were non-neoplastic. Since a diagnosis of the lesion nature is impossible with current neuroradiological means, the authors noting a variety of masses found in their experience, emphasize the importance of stereotactic biopsy, as a scarcely invasive method to give a precise diagnosis and a possible treatment.

Adolescent↗
PubMed1988

Perioperative lumbar injection of Ringer's lactate solution in chronic subdural hematomas: a series of 100 cases.

A series of 100 patients underwent surgical treatment for chronic subdural hematomas between 1979 and 1987. The procedure consisted of craniectomy with a 30-mm trephine, irrigation and drainage of the hematoma, laceration of the outer and inner membranes, and lumbar intrathecal injection of Ringer's lactate solution for immediate cerebral reexpansion (average injection, 130 ml). This technique gave the following results: 2% mortality, 2% moderate morbidity, and 96% recovery. The recovery of the patients was rapid, and good outcome was achieved in Grade 3 and Grade 4 cases (Markwalder's classification).

Adult↗
PubMed1988

[Stereotaxic guidance in open surgery of the brain].

The authors describe the technique used to precisely locate, before surgical ablation, small superficial or deep seated intracerebral lesions. When they are superficial, a burrhole is placed above the lesional site, that is reconstructed by superimposing the CT image onto a plain film radiogram taken during stereotaxy. Deep seated lesions are localized by inserting a guide under stereotaxy, prior to open surgery, which will lead the neurosurgeon without error from the cortex to the lesion. 37 observations are reported where this technique lead to a greatly simplified intervention with minimal cortical damage.

Brain↗
PubMed1987

[Modern imaging and stereotaxy].

The authors present their technique of utilization in stereotaxic neurosurgery of CT and IRM documents realized in standard condition. Besides, they present an original apparatus that allows to combine the advantages of Leksell and Talairach's stereotaxic system.

Brain↗
PubMed1985

[Results of percutaneous selective thermocoagulation of Gasser's ganglion in essential facial neuralgia. Synthesis of results obtained in 939 treated patients].

The authors report the late results of thermocoagulation of the gasserian ganglion in 939 patients operated by 3 different neurosurgical teams, (Bologna, Bordeaux, Marseille). It has been assessed that the results are comparable among the 3 teams and that percutaneous selective thermocoagulation represents a simple and low-risk technique with a high rate of efficacity.

Electrocoagulation↗
PubMed1984

Paired twisted filaments: a new ultrastructural marker of human pinealomas?

Paired twisted filaments (PTF) forming helices are described in tumor cells of three human pinealomas. Each filament was 8.11 +/- 1.55 nm wide. The maximal width of the helix was 16.62 +/- 2.62 nm. The periodicity of the constrictions was 26.63 +/- 4.49 nm. These characteristics appeared original, suggesting protein filaments possibly specific of pinealocytes. The similarities and discrepancies between PTF and Alzheimer's paired helical filaments (PHF) are discussed.

Adult↗
PubMed1983

Specific ultrastructural markers of human pinealomas. A study of four cases.

An ultrastructural study of four pinealomas was carried out to precise eventual specific markers. Dark and clear cells joined with zonulae adherents, extensive and pleiomorphous processes, a complex vacuolar system, and characteristic organelles (lysosome-like structures, clear and dense-core vesicles, vesicle-crowned rodlets and related structures, microtubular sheaves and centriolar derivatives, membranous whorls, fibrous bodies, microtubules, heterogeneous cytoplasmic inclusions) offered a typical pattern. No correlation could be made between the histological and ultrastructural features. The authors stress the ultrastructural similarities between the human tumor cells and the mammalian pineal cells. Pinealomas appeared as a morphological entity distinct from neuronal and astrocytic tumors.

Adolescent↗