[Fractures of the ischium after laminoarthrectomy. Retrospective study of a series of 31 patients].

Purpose Of The Study: Pars interarticularis fracture is one possible source of pain after laminoarthrectomy. The purposes of this study were: to describe the pars defect, to determine its causes and to analyse its consequences on the functional final result.

Material And Method: 31 patients operated for disc herniation or degenerative lumbar stenosis were retrospectively studied.

Chemonucleolysis: correlation of results with the size of the herniation and the dimensions of the spinal canal.

The aim of this study was to determine whether the results of chemonucleolysis are related to the size of the disc herniation and to the dimensions of the spinal canal. Short and long-term results (average follow-up 4 and a half years) of 148 patients were evaluated. Measurements made with a divider included the size of the disc herniation related to the sagittal diameter of the spinal canal at the discal level and the transverse interligamentous diameter at the level of the facet joints.

Left tuberothalamic artery territory infarction: neuropsychological and MRI features.

We examined a 29-year-old woman who had language disturbances and memory impairment after a left thalamic infarction. MRI showed injury that was limited to the tuberothalamic artery territory. Beside reduced voice volume and verbal memory trouble, she presented with aspontaneity, loss of psychic self-activation and affective drive.

Diagnosis of abdominal venous thrombosis by means of spin-echo and gradient-echo MR imaging: analysis with receiver operating characteristic curves.

The authors compared the accuracy of spin-echo (SE) and gradient-echo (GRE) magnetic resonance images in diagnosis of abdominal venous thrombosis. Images of 292 abdominal veins in 72 patients were reviewed in a blinded manner by three radiologists, with seven levels of confidence for diagnosis. Corroborative studies proved thrombosis (n = 95) and vessel patency (n = 197).

[Infratemporal extension of tumors of the skull base].

The tumors of the middle and posterior portion of the skull base may extend extracranially. The spread of the tumors towards the infratemporal fossa is rare. Among 23 skull base tumors with extracranial extension which were diagnosed during the last 5 years, only two middle ear epidermoid carcinomas extended into the infratemporal fossa.