MYOPATHY, CONGENITAL, WITH FIBER-TYPE DISPROPORTION

General Information (adopted from Orphanet):

Synonyms, Signs: FIBER-TYPE DISPROPORTION MYOPATHY, CONGENITAL
CFTD
CFTDM
Number of Symptoms 31
OrphanetNr:
OMIM Id: 255310
ICD-10:
UMLs:
MeSH:
MedDRA:
Snomed:

Prevalence, inheritance and age of onset:

Prevalence: No data available.
Inheritance: Autosomal dominant inheritance
Heterogeneous
[Omim]
Age of onset: Congenital onset
[Omim]

Disease classification (adopted from Orphanet):

Parent Diseases: No data available.

Symptom Information: Sort by abundance 

1
(HPO:0000276) Long face 109 / 7739
2
(HPO:0000218) High palate 356 / 7739
3
(HPO:0010628) Facial palsy 146 / 7739
4
(HPO:0000275) Narrow face 76 / 7739
5
(HPO:0000602) Ophthalmoplegia 56 / 7739
6
(HPO:0000544) External ophthalmoplegia 40 / 7739
7
(HPO:0000597) Ophthalmoparesis 71 / 7739
8
(HPO:0000508) Ptosis 459 / 7739
9
(HPO:0002015) Dysphagia 301 / 7739
10
(HPO:0001371) Flexion contracture 220 / 7739
11
(HPO:0003121) Limb joint contracture 8 / 7739
12
(HPO:0002650) Scoliosis 705 / 7739
13
(HPO:0002938) Lumbar hyperlordosis 73 / 7739
14
(HPO:0001374) Congenital hip dislocation 51 / 7739
15
(HPO:0001558) Decreased fetal movement 74 / 7739
16
(HPO:0011968) Feeding difficulties 240 / 7739
17
(HPO:0001508) Failure to thrive 454 / 7739
18
(HPO:0002747) Respiratory insufficiency due to muscle weakness 48 / 7739
19
(HPO:0001612) Weak cry 17 / 7739
20
(HPO:0003324) Generalized muscle weakness 48 / 7739
21
(HPO:0003701) Proximal muscle weakness 105 / 7739
22
(HPO:0001283) Bulbar palsy 31 / 7739
23
(HPO:0001319) Neonatal hypotonia 101 / 7739
24
(OMIM) Decreased numbers of type 2B fibers 1 / 7739
25
(OMIM) Centralized nuclei may be seen 1 / 7739
26
(OMIM) Increased numbers of type 1 fibers 1 / 7739
27
(OMIM) Mechanical ventilation required in severe cases 1 / 7739
28
(OMIM) Decreased forced vital capacity 3 / 7739
29
(OMIM) Muscle biopsy shows hypotrophy of type 1 muscle fibers 1 / 7739
30
(OMIM) Type 1 fibers are at least 12% smaller than type 2 fibers 2 / 7739
31
(OMIM) Dilated cardiomyopathy has been reported in 1 patient 1 / 7739

Associated genes:

ClinVar (via SNiPA)

Gene symbol Variation Clinical significance Reference

Additional Information:

Description: (OMIM) Congenital fiber-type disproportion (CFTD) myopathy is a genetically heterogeneous disorder in which there is relative hypotrophy of type 1 muscle fibers compared to type 2 fibers on skeletal muscle biopsy. However, these findings are not specific and can ...
Clinical Description OMIM Brooke (1973) reported 12 cases and coined the term 'congenital fiber-type disproportion.' All patients had hypotrophy of type 1 muscle fibers, which were at least 12% smaller than either type 2A or type 2B fibers. Clinical features included ...
Molecular genetics OMIM In 3 unrelated patients with severe CFTD myopathy, Laing et al. (2004) identified 3 different mutations in the ACTA1 gene (D292V, 102610.0011; L221P, 102610.0012; P332S, 102610.0013). The authors reported that ACTA1 mutations accounted for approximately 6% of cases ...
Diagnosis GeneReviews Diagnosis of congenital fiber-type disproportion (CFTD), a genetically and clinically heterogeneous congenital myopathy, is based on a combination of the following [Brooke 1973, Clarke & North 2003, North 2004]: ...
Clinical Description GeneReviews Clarke & North [2003], North & Goebel [2003], and North [2004] provide summaries of the natural history of congenital fiber-type disproportion (CFTD), while Sobrido et al [2005], Clarke et al [2008], Clarke et al [2010], and Lawlor et al [2010] present clinical data on the largest number of affected individuals with known mutations. Together, these citations are the primary references for the majority of this section. Findings are summarized in Table 2....
Genotype-Phenotype Correlations GeneReviews Some genotype-phenotype correlations have been established. See Testing Strategy for more information on muscle imaging-related genotype-phenotype correlations. ...
Differential Diagnosis GeneReviews Congenital myopathies. The primary differential diagnoses are other congenital myopathies, including centronuclear/X-linked myotubular myopathy, multiminicore disease, and nemaline myopathy [Clarke & North 2003]....
Management GeneReviews To establish the extent of disease and needs in an individual diagnosed with congenital fiber-type disproportion, the following evaluations are recommended:...
Molecular genetics GeneReviews Information in the Molecular Genetics and OMIM tables may differ from that elsewhere in the GeneReview: tables may contain more recent information. —ED....