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Isolated progressive muscle weakness with tubular aggregates
G Alonso-Losada1, I Cimas, R Pego
1Department of General Pathology and Neuropathology, Hospital Meixoeiro, Vigo, Spain.
Clinical Neuropathology
|March 13, 1998
Summary
This study details two cases of slowly progressive muscle weakness characterized by tubular aggregates in muscle fibers. These findings contribute to understanding a rare myopathy with distinct clinical presentations.
Area of Science:
- Neurology
- Pathology
Background:
- Myopathy with tubular aggregates is a recognized clinicopathological entity.
- It is classified into three distinct clinical groups.
Observation:
- Two isolated cases of slowly progressive muscle weakness were identified.
- Muscle biopsies revealed tubular aggregates as the primary pathological finding in both fiber types.
Findings:
- Electron microscopy showed dense subsarcolemmal accumulations of double-walled tubular structures.
- Smaller amounts of these structures were observed within myofibrils near cytoplasmic organelles.
Implications:
- These cases represent a rare form of sporadic isolated progressive muscle weakness.
- Further research into tubular aggregate myopathy is warranted to elucidate its pathogenesis and treatment.