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Early onset facioscapulohumeral muscular dystrophy
O F Brouwer1, G W Padberg, E Bakker
1Department of Neurology, Leiden University, The Netherlands.
Insights
Early-onset facioscapulohumeral muscular dystrophy (FSHD) presents similarly to typical FSHD cases. Genetic and clinical findings in infantile FSHD do not significantly differ from later-onset forms.
Area of Science:
- Neurology
- Genetics
- Muscular Dystrophy Research
Background:
- Facioscapulohumeral muscular dystrophy (FSHD) is a genetic myopathy characterized by progressive muscle weakness.
- While typically presenting in adolescence or adulthood, early-onset forms can occur.
Observation:
- This study examined 10 patients with early infantile onset of FSHD, including familial and sporadic cases.
- Clinical manifestations, including facial and shoulder girdle weakness, were observed.
- Southern blotting with p13E-11 was conducted on 7 patients.
Findings:
- Early-onset FSHD patients exhibited a clinical spectrum comparable to typical FSHD.
- Genetic analysis revealed an abnormal EcoRI fragment (13-22 kb) in 6 out of 7 patients tested.
- No significant clinical or genetic divergence was found between early-onset and regular FSHD.
Implications:
- Infantile-onset FSHD appears to follow similar clinical and genetic patterns as later-onset FSHD.
- The underlying mechanisms driving the wide clinical variability in FSHD remain an area for further investigation.
- This research contributes to understanding the spectrum of facioscapulohumeral muscular dystrophy presentation.
Abstract:
We report 10 patients (5 familial, 5 sporadic) with facioscapulohumeral muscular dystrophy (FSHD) with onset of facial and shoulder girdle weakness in early infancy. They showed the same broad range of clinical signs and symptoms as can be seen normally in FSHD. In 7 patients Southern blotting with p13E-11 was performed which showed an abnormal EcoRI fragment (13-22 kb) in 6 of them. We conclude that early onset FSHD does not differ from regular FSHD clinically or genetically. However, the precise mechanisms involved in the extensive clinical variability of the disease are still unknown.