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Neurodegenerative features in developmental brain disorders.

M Hayashi1, S Araki, S Kumada

  • 1Department of Clinical Neuropathology, Tokyo Metropolitan Institute for Neuroscience, Fuchu-shi, Japan. mahayasi@tmin.ac.jp

Neuropathology : Official Journal of the Japanese Society of Neuropathology
|April 17, 2001
PubMed
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Neurofibrillary tangles (NFT) and spheroids were found in some young patients with developmental brain disorders. Mechanisms like accelerated aging and anoxic insults may contribute to these neuronal changes.

Area of Science:

  • Neuropathology
  • Developmental Neuroscience
  • Neurodegenerative Diseases

Background:

  • Non-progressive developmental brain disorders in individuals under 40 present unique neuropathological challenges.
  • Understanding early-onset neuronal changes is crucial for diagnosing and managing these conditions.

Purpose of the Study:

  • To investigate the presence and distribution of specific neuropathological markers in young patients with non-progressive developmental brain disorders.
  • To explore potential mechanisms underlying observed neuronal alterations.

Main Methods:

  • Histopathological examination of brain tissue from 62 patients under 40 years old with non-progressive developmental brain disorders.
  • Analysis included neurofibrillary tangles (NFT), senile plaques, spheroids, grumose or foamy spheroid bodies (GFSB), and brainstem inclusions.

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Main Results:

  • Neurofibrillary tangles (NFT) were observed in five cases, primarily in subcortical nuclei; senile plaques were absent.
  • Increased spheroids in Goll's nucleus were noted in congenital brain anomalies and perinatal hypoxic ischemic encephalopathy.
  • Grumose or foamy spheroid bodies (GFSB) were found in congenital malformations and perinatal brain disorders affecting the basal ganglia.
  • Unique eosinophilic intracytoplasmic inclusions were identified in the substantia nigra and/or locus ceruleus in two subjects.

Conclusions:

  • The study identified specific neuropathological changes, including NFT and spheroids, in young individuals with developmental brain disorders.
  • Accelerated aging and anoxic insults are hypothesized as potential contributing factors to these early-onset neuronal alterations.
  • Further research is needed to elucidate the precise mechanisms of neuronal changes secondary to early developmental brain damage.