XXXX of the spinal cord and review of the literature.

@entity424 @entity39 @entity5 @entity146 @entity602 @entity1221 @entity1757 @entity816 @entity10220
@entity10220 is a @entity1221 , which frequently occurs in the ventricles and rarely in the spinal cord. Most of the @entity1757 are subclinical and thus incidentally encountered at autopsy, whereas the spinal ones are inevitably accompanied by @entity602 and are often diagnosed clinically as @entity424 or @entity816 . Two cases of @entity602 are reported, one of which recurred 9 years after the initial operation. All specimens of both cases showed similar microscopic features. Within a highly fibrillary background, round to ovoid @entity5 cells were unevenly distributed and arranged in cell clusters. Mitoses were rarely encountered. No @entity39 was demonstrated in any of the specimens. Ultrastructural examination demonstrated many slender processes containing abundant intermediate filaments and occasional small lumen-like structures with many microvillous projections and cell junctions. @entity10220 arising in the spinal cord should be distinguished from other more @entity146 , such as diffuse @entity816 and @entity424 . Characteristic microscopic features and the ultrastructural studies support the diagnosis.
