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Related Concept Videos

Parkinson's Disease: Overview01:15

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479
Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is...
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Related Experiment Video

Updated: Jun 5, 2025

Clinical Testing and Spinal Cord Removal in a Mouse Model for Amyotrophic Lateral Sclerosis ALS
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Diagnosing primary lateral sclerosis: a clinico-pathological study.

Eva M J de Boer1, Bálint S de Vries1, Wim Van Hecke2

  • 1Department of Neurology, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands.

Journal of Neurology
|December 12, 2024
PubMed
Summary
This summary is machine-generated.

Diagnosing primary lateral sclerosis (PLS) is challenging due to varied pathologies and lack of a gold standard. Expert consensus was limited, highlighting the need for clearer diagnostic guidelines and neuropathological confirmation for this motor neuron disease.

Keywords:
Amyotrophic lateral sclerosisNeuropathologyPrimary lateral sclerosisTDP-43Tau

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Area of Science:

  • Neurology
  • Neuroscience
  • Pathology

Background:

  • Primary lateral sclerosis (PLS) is a rare motor neuron disease defined by upper motor neuron degeneration.
  • Clinical diagnosis of PLS lacks a definitive neuropathological gold standard, complicating post-mortem analysis.
  • Existing post-mortem studies, especially those analyzing TDP-43 pathology, are scarce.

Purpose of the Study:

  • To investigate diagnostic challenges and accuracy in primary lateral sclerosis (PLS).
  • To analyze clinico-pathological discrepancies in cases meeting PLS diagnostic criteria.
  • To assess expert consensus on diagnosing PLS and its mimics.

Main Methods:

  • Review of five autopsy cases initially diagnosed with PLS but showing conflicting neuropathological findings.
  • International expert panel review using an e-module and structured questionnaires.
  • Analysis of diagnostic discrepancies, missing investigations, and differential diagnoses.

Main Results:

  • Neuropathology revealed diagnoses including amyotrophic lateral sclerosis (ALS), ALS/PLS overlap, progressive supranuclear palsy, and unexplained myelin loss.
  • Experts identified numerous missing ancillary investigations and a wide range of differential diagnoses.
  • Expert panel diagnoses changed in 42% of cases following review of autopsy findings, indicating significant diagnostic uncertainty.

Conclusions:

  • Diverse underlying pathologies can mimic PLS, presenting significant diagnostic challenges.
  • Limited expert consensus highlights the need for improved diagnostic consistency in PLS.
  • Development of explicit guidelines to exclude mimics and establish a neuropathological gold standard is crucial for PLS research and treatment.