[Anatomic variants of Meckel's cave on MRI].

Magnetic resonance imaging (MRI) gives an accurate analysis of Meckel's cave variability. Images were acquired in 50 patients with several sections for anatomical comparison. Using several sections, MRI is a suitable method for better analysis of the trigeminal cistern.

[Spinal subdural hematoma. Presentation of 2 cases studied with MRI].

Spinal subdural hematomas are rare. They should be considered in the diagnosis of spinal cord compression. Prompt surgical treatment, if it is performed, may lead to complete recovery of the neurological deficit.

[MRI of normal spinal epidural fat].

The authors perform a retrospective study of 65 spines examined with MRI. They specify the distribution of normal posterior epidural fat and establish the relationship between the anteroposterior thickness of epidural fat and the sagittal diameter of the spine on axial sections. On sagittal sections, the fat has a variable appearance, but a constant location along the spinal canal.

[MRI of the spinal epidural fat in pathology].

The authors report about their experience with the merits of the normal systematization of epidural fat with MRI. On sagittal sections, this fat has a variable appearance, but its location along the spinal canal is constant. On axial sections, its morphology is suggestive of the level of section: cervical, upper or lower thoracic, lumbar.

[MRI of malformative syringomyelia. Descriptive and developmental aspect].

132 cases of malformative syringomyelia have been studied at the C.I.E.