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Biomedical subjects

D Maitrot

Publications and source records attributed to D Maitrot.

At least 37 records · Page 2Linked to original sources
PubMed1996

Intracanalicular and intratemporal facial nerve schwannomas.

Facial nerve schwannomas can mimic acoustic neuromas. We report herein two cases: a purely intracanalicular and an intratemporal facial nerve tumor extending into the internal auditory canal and the cerebellopontine angle. These tumors have to be suspected in patient with small-size tumors presenting with facial paralysis. We advocate translabyrinthine or middle fossa approach to facilitate nerve anastomosis. The establishment of the correct properative diagnosis is difficult, but the patient must be warned about the impossibility of preserving the facial nerve in these tumors.

Case Reports↗
PubMed1996

[Cavernous hemangioma of the geniculate ganglion. Value of otoneurosurgical collaboration].

A patient with a progressive peripheral facial paralyses should be considered to have a tumor involved the facial nerve until proved otherwise. Haemangiomas of the temporal bone are uncommon and the present study discusses pathology, clinical presentation and therapeutic management of a tumor located at the geniculate ganglion. Complete surgical removal by the middle fossa approach is the treatment of choice with adequate margins and preservation of adjacent structures when it is oncologically possible. The surgeon must be familiar with all aspects of facial nerve repair.

Adult↗
PubMed1993

Cervical nucleolysis: indications, technique, results. 190 patients.

For many years now percutaneous techniques have proved effective in the curative treatment of lumbar disc herniation, mostly in young subjects. This technique, however, is seldom indicated, let alone performed, in the cervical spine for a variety of reasons: a) the neck contains several closely arranged structures such as the vasculo-nervous bundles, the airway-digestive tract and the cervical spine around the spinal cord; b) the disc is approached by the anterior route, in contrast with the lumbo-sacral spine where the approach is posterolateral; c) the manufacturers insist on restrictions in the use of chymopapain in view of the potential risk of spinal cord damage, either by possible breaks in the meninges of by accidental diffusion of the enzyme into perimedullary epidural structures which support a particularly developed venous plexus; d) legal protection may be denied to operators who perform cervical chemonucleolysis, since the product has not yet been officially authorized, in France and perhaps elsewhere*, for treatment of cervical disc herniation. Several years of experience in the practice of cervical nucleolysis have convinced the authors that this method is remarkably effective and can be used in the treatment of cervicobrachial neuralgia (CBN) occurring in young subjects. Radiculalgia is essentially due to a disc fragment being positioned within the vertebral canal or a foramen, thereby compressing the nerve roots. During several years microsurgery of the disc has been effective in the treatment of refractory radiculalgia, and to compete with this procedure familiar to neurosurgeons cervical nucleolysis must convincingly demonstrate that its therapeutic value is at least as good as that of surgery. Finally, the vast majority of cervical disc herniations is made up of free disc fragments located within the meshes of the posterior longitudinal ligament of the spine (transligamentous fragment). Cervical nucleolysis was introduced in France by Bonafe and Lazorthes made enthusiastic by their first studies, and the idea of this procedure, developed by a radio-neurosurgical team, has gradually been gaining ground. The decision to intervene is made when the radiculalgia is recurrent or resistant to a well-conducted medical treatment of several weeks duration. Therefore all disc herniations that would have been treated surgically can be treated by injection of an enzyme. This point is very important, and in fact the well-codified and effective surgical procedure has progressively been abandoned by the operators, in view of the simplicity of nucleolysis and the rapid pain relief it procures.(ABSTRACT TRUNCATED AT 400 WORDS)

Adult↗
PubMed1990

Dandy-Walker variant malformation, spastic paraplegia, and mental retardation in two sibs.

Two sibs, a boy and a girl, had both hypoplasia of the cerebellar hemispheres and partial agenesis of the cerebellar vermis with normal communication between the fourth ventricle and arachnoid spaces, i.e., the manifestations of the Dandy-Walker variant malformation associated with agenesis of the corpus callosum. Both sibs were mentally retarded and had spastic paraplegia. The occurrence of a distinct and similar pattern of congenital anomalies in sibs born to healthy parents points toward a "new" syndrome caused by the homozygous state of an autosomal recessive gene. Prenatal ultrasonographic diagnosis is possible at least for the more severe form of the brain anomalies.

Brain↗
PubMed1987

[Bilateral meningioma of the optic nerve. Discussion apropos of a case].

The authors report a case of a 14 years old girl with a bilateral optic neuropathy especially an optic atrophy on the left eye. They show the clinical and radiological diagnostic difficulty of these symptoms before coming to the bilateral optic nerve meningioma. The authors have compared this rare case to those described in literature and insist on the importance of the CT Scan and eventually the nerve surgical exploration.

Adolescent↗
PubMed1986

Soft cervical disc herniations.

The authors report their findings in a series of 51 patients suffering from typical cervical radiculopathy. With the aid of the CT scanner and intravenous injection of a contrast medium, the quality and resolution of the resulting images allowed neurosurgical intervention in 42 patients in whom the symptomatology alone was not sufficiently informative to allow successful treatment. In most cases the CT images allowed an accurate diagnosis and revealed a free fragment that had torn the common posterior vertebra ligament.

Adult↗
PubMed1982

Spinal subdural metastasis. A case report.

A case of metastasis to the thoracic spinal subdural space is reported. Metrizamide myelography showed narrowing of the upper thoracic subarachnoid space. A tumor in the spinal subdural space is unusual; only a few cases have been reported. The myelographic appearance is not specific; an epidural metastasis can produce the same myelographic picture.

Carcinoma, Bronchogenic↗
PubMed1982

CT findings in malignant meningiomas.

Recurrent meningiomas are due usually to incomplete removal as in the case of basal meningiomas where the tumour surrounding vessels and nervous structures cannot be completely excised. Recurrent meningiomas of the convexity are rare after resection. In most recurrent cases histological changes are noted which may explain the rapid growth, the aggressive nature and also the malignancy of the tumour. These changes include increased mitotic activity, necrosis and invasion of the adjacent brain parenchyma. CT findings in malignant meningiomas are related to the microscopic appearance of these tumours: tumoral necrosis determines heterogeneous enhancement; brain invasion explains the irregular outline of the tumour and sometimes the absence of surrounding low attenuation area. The authors report 5 malignant meningiomas in which the CT findings are correlated with the microscopic findings.

Aged↗
PubMed1982

Percutaneous puncture of spinal cysts in the diagnosis and therapy of syringomyelia and cystic tumors.

The experience with percutaneous puncture of intraspinal cystic lesions is reported in four cases: an extradural cyst demonstrated with air, a spinal cord tumor with lipiodol and two cases of syringomyelia with metrizamide. Percutaneous puncture of cystic lesions makes possible an accurate delineation of the lesion and a histological approach through biochemical and cytological analysis of the aspirated cystic fluid, while aspiration of the fluid of cystic tumors decompresses the spinal cord and thus plays a therapeutic role.

Adult↗