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[Congenital fiber-type disproportion: analysis of a series of 11 cases]
Insights
Congenital Fiber Type Disproportion (CFTD) may present as two distinct clinical groups. Some patients have CFTD alone with a good prognosis, while others experience it alongside other congenital diseases, impacting their overall outlook.
Area of Science:
- Neurology
- Genetics
- Pediatrics
Context:
- Congenital Fiber Type Disproportion (CFTD) is a rare neuromuscular disorder.
- Understanding CFTD's clinical heterogeneity is crucial for diagnosis and management.
Purpose:
- To delineate distinct clinical presentations and prognoses of CFTD.
- To investigate the association of CFTD with other congenital diseases.
Summary:
- Presents findings from 11 patients with CFTD, identifying two clinical groups.
- Group 1: Isolated CFTD with a generally good prognosis, though severe respiratory issues can be fatal.
- Group 2: CFTD associated with other congenital conditions (e.g., Lowe's, Möbius' Syndromes, hypothyroidism, hydrocephalus), where prognosis is influenced by the co-occurring diseases.
Impact:
- Suggests CFTD might be a histological marker rather than a specific myopathy.
- Highlights the need to consider diverse etiological factors contributing to muscle fiber abnormalities.
Abstract:
We present 11 patients with congenital fiber type disproportion suggesting the existence of two different clinical groups. The first group not associated with other diseases, presents a uniform clinical picture and a generally good prognosis, although the patients with severe respiratory involvement can die. The second group includes the cases in which CFTD is associated with other congenital diseases such as Lowe's Syndrome, Möbius' Syndrome, hypothyroidism and hydrocephalus. In this group the clinical presentation and prognosis is that of the associated disease added to that of CFTD. The frequent association of CFTD with other congenital diseases suggests that CFTD may not be a specific myopathy but a histological abnormality due to different pathogenic insults which interfere with the normal growth and maturation of the muscle fibres.