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Motor neuron disease with predominantly upper extremity involvement: a clinicopathological study
1Department of Neurology, Neurological Institute, Tokyo Women's Medical College, 8-1, Kawada-cho, Shinjuku-ku, Tokyo 162, Japan.
Acta Neuropathologica
|December 22, 1999
Summary
This study examines two motor neuron disease (MND) cases with unique upper body muscle atrophy, suggesting a potential new subgroup of amyotrophic lateral sclerosis (ALS). Autopsy revealed distinct spinal cord and brain changes, differentiating the cases.
Area of Science:
- Neurology
- Pathology
- Neuroscience
Background:
- Investigating rare presentations of motor neuron disease (MND) is crucial for understanding disease heterogeneity.
- Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disorder affecting motor neurons.
Observation:
- Two autopsy cases of MND presented with unusual shoulder girdle and proximal upper extremity muscle atrophy.
- Clinical categorization suggested the El Escorial suspected form of amyotrophic lateral sclerosis (ALS).
Findings:
- Autopsy revealed significant loss of spinal anterior horn cells with astrogliosis at the cervical level in both cases.
- Distinct pathological findings were observed at the lumbosacral level, including Bunina bodies and ubiquitin-positive inclusions.
- One case showed widespread pathology consistent with ALS, while the other exhibited findings compatible with progressive spinal muscular atrophy.
Implications:
- These findings suggest a distinct subgroup of motor neuron disease with peculiar progressive muscular atrophy.
- Further research into this subgroup could refine diagnostic criteria and therapeutic strategies for MND and ALS.
- Understanding these variations is key to advancing research in neurodegenerative diseases.