ISSN:
1432-0533
Keywords:
Bunina bodies
;
Anterior horn cells
;
Amyotrophic lateral sclerosis
;
Cytoplasmic laminar bodies
;
Electron microscopy
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary Light and electron microscopic studies were made on the anterior horn cells in a case of amyotrophic lateral sclerosis. Eosinophilic inclusions of Bunina type were observed almost selectively in the motor neurons of spinal cord, as well as of brain stem, at the light microscopic level. Fine structural study revealed the presence of two types of cytoplasmic inclusions. The first, mainly corresponding to the light microscopic inclusions, were homogeneous, electron-dense, round- or oval-shaped bodies with vesicular or tubular rims and ribosome particles, about 2–5 μ in diameter, which contained filaments or other cytoplasmic components in the clear areas within them. The second were lamellar structures (laminated cytoplasmic bodies, Morales) which appeared to be originating from endoplasmic reticulum. There was no distinct transition in these two types of inclusions and the relationship to each other is not clear. The significance of Bunina body is unknown, but some manifestation of a primary disorder, e.g., protein metabolism, rather than a secondary degenerative change in the motor neurons in amyotorophic lateral sclerosis.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00690971
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