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Query: UMLS:C0026850 (muscular dystrophy)
 5,870 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Type II lissencephaly is a rare cortical malformation associated with a number of clinical syndromes, including Walker-Warburg syndrome and some forms of congenital muscular dystrophy. The neuropathology of a 20-week fetus is described showing the pathogenesis of the malformation, which appears to result from abnormal migration of neurons through the pial-glial barrier into the leptomeninges.
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PMID:Fetal type II lissencephaly: a case report. 830 55

Four children with congenital muscular dystrophy (CMD), eye and brain abnormalities are described. Their clinical and neuroradiological features are compatible with a diagnosis of Walker-Warburg syndrome (WWS), according to the criteria proposed by Dobyns et al. (i.e., presence of type II lissencephaly, typical cerebellar and retinal malformations, CMD), who also conclude that WWS is indistinguishable from the muscle-eye-brain disease (MEBD) described by Santavuori. On the basis of our own experience and two recently published series, we emphasize certain features that are different in patients with WWS and patients with MEBD, which make their inclusion in the same syndrome dubious.
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PMID:Congenital muscular dystrophy, brain and eye abnormalities: one or more clinical entities? 831 37

We report a Japanese boy with the Walker-Warburg syndrome. He had typical clinical features, including type II lissencephaly, congenital muscular dystrophy and an ocular abnormality associated with previously undescribed findings, a double cortical layer and an isolated cyst evident on magnetic resonance imaging, and an increased level of serum IgM. We speculate that the inner layer of the cortices in this case represents a layered heterotopia under the cerebral cortex.
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PMID:A case of Walker-Warburg syndrome with uncommon findings. Double cortical layer, temporal cyst and increased serum IgM. 833 13

There have been numerous reports as well as case presentations, in the field of clinical research since Fukuyama type congenital muscular dystrophy (FCMD) was first reported by Fukuyama et al. as a peculiar form of congenital progressive muscular dystrophy (CMD). Toda et al. localized the FCMD gene locus to chromosome 9q31-33 using genetic linkage analysis. Clinical application of molecular genetic studies is a new and exciting aspect of FCMD research. The author reviewed the literature and discusses herein: [1] the classification of CMD and the position of FCMD, [2] researches on the pathogenesis and pathophysiology of FCMD, [3] DNA diagnosis using polymorphism analysis (carrier diagnosis and prenatal diagnosis), [4] approaches to clinical heterogeneity in FCMD, [5] the difference between FCMD and Walker-Warburg syndrome. In addition, data accumulated by the authors are presented.
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PMID:[Recent advances in Fukuyama type congenital muscular dystrophy]. 853 9

Considerable advances in the understanding of congenital muscular dystrophy made during the past year may allow a new clinical classification of this disease. In particular, (1) evidence has accumulated to suggest that a laminin alpha2-chain (alpha2 subunit of laminin-2 or merosin) deficiency causes a type of congenital muscular dystrophy, and (2) it has been postulated that Fukuyama-type congenital muscular dystrophy and Walker-Warburg syndrome (but not Finnish muscle-eye-brain disease) are genetically identical diseases.
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PMID:Congenital muscular dystrophies. 854 45

Cobblestone lissencephaly is the characteristic brain malformation observed in Fukuyama congenital muscular dystrophy (FCMD), muscle-eye-brain disease (MEB), and Walker-Warburg syndrome (WWS). The diagnostic criteria for all three require the presence of congenital muscular dystrophy, and criteria for MEB and WWS require retinal abnormalities. We report three patients from two consanguineous families of Middle Eastern origin with cobblestone lissencephaly but no abnormalities of the eyes or muscle. Based on the current diagnostic criteria for the cobblestone lissencephaly syndromes, this disorder must be classified separately from the others, but it may well be allelic to MEB and WWS. Linkage studies have excluded the gene for this disorder from the region of the FCMD gene on chromosome 9q31-32.
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PMID:Cobblestone lissencephaly with normal eyes and muscle. 873 21

Fukuyama type congenital muscular dystrophy (FCMD) is an autosomal recessive muscular dystrophy associated with an anomaly of the brain. We performed genetic linkage analyses using consanguineous FCMD families and localized the FCMD locus to chromosomes 9q31-33. We further defined the locus within a region of 5 cM and also found strong linkage disequilibrium between FCMD and mfd220. We suspect that the FCMD gene could lie within one megabases of the mfd220 locus located on 9q31. This achievement made prenatal and carrier diagnosis in families carrying FCMD feasible. However, in principle, it is impossible to diagnose whether a patient has FCMD or not, since this is an indirect genetic diagnosis by polymorphisms analysis. It has been discussed whether FCMD and Walker-Warburg syndrome (WWS) belong to the same disease entity or not. We analyzed a family in which 3 siblings were affected with either FCMD or WWS. The results suggested that both FCMD and WWS siblings shared the identical combination of mutations on either allele of the FCMD locus. Some WWS cases could be caused by mutations in the FCMD gene. A novel clinical entity of merosin-negative CMD was proposed out of classical, non-Fukuyama CMD cases. This condition mapped to 6q2, the merosin gene region. CMD researches are in rapid progress.
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PMID:[Recent progress, genetic diagnosis and its problem on congenital muscular dystrophies (Fukuyama and non-Fukuyama types)]. 875 16

Major advances in the genetic understanding of the limb-girdle (LGMD) and congenital (CMD) muscular dystrophies have led to a new, genetically based classification of these disorders. The definition of the complex of dystrophin-associated proteins on a biochemical and subsequently genetic level has greatly accelerated this progress by providing candidate genes to complement or replace the process of linkage analysis either in families with muscular dystrophy or in sporadic cases. The major components of the dystrophin-associated proteins now known to be involved in muscular dystrophy besides dystrophin itself ar the sarcoglycan complex and the alpha 2-chain (merosin) of laminin-2 in the extracellular matrix. Mutations in the various sarcoglycans account for four types of autosomal recessive LGMD of varying severity (types 2C through 2F), including severe childhood-onset presentations. One type of autosomal recessive LGMD (type 2A) is caused by mutations in the protease calpain-3, whereas the gene for type 2B has not yet been identified, although the responsible locus has been assigned to chromosome 2p13. There are different autosomal dominant forms as well, one of which has been mapped to chromosome 5q31. With regard to CMDs, the major breakthrough involves a type of "classic" CMD with abnormalities of the white matter on magnetic resonance imaging of the brain. These patients show deficiencies of the laminin alpha 2-chain, and mutations in the corresponding gene have been identified. The group of laminin alpha 2-chain-positive classic CMD likely is heterogeneous. Among the group of CMDs with abnormalities of brain formation and mental retardation, genetic, immunohistochemical, and clinical differences are now beginning to emerge to help in the distinction between Fukuyama muscular dystrophy, the Walker-Warburg syndrome, and muscle-eye-brain disease.
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PMID:Beyond dystrophin: current progress in the muscular dystrophies. 901 40

We report on two sisters of first degree cousin parents who were born with severe hypotonia, arthrogryposis multiplex congenita (AMC) and dysmorphic features consistent with the fetal akinesia/hypokinesia sequence. They needed assisted ventilation and each died at the age of 5 months. Both had type II lissencephaly (cobblestone lissencephaly) which was visualized by magnetic resonance imaging (MRI) in the proband. Ophthalmic evaluation revealed no ocular malformations in either of them. Brain auditory evoked potentials (BAEP) revealed bilateral severe sensorineural hearing loss in the proband, whereas an MRI-guided open muscle biopsy of the sartorius muscle (the only remaining thigh muscle) showed features of muscular dystrophy. Immunohistochemistry revealed normal dystrophin, dystrophin-associated glycoproteins (DAG) and merosin. Certain clinical and pathological features distinguish the disease seen in these sisters from reported isolated cases where lethal AMC was associated with brain dysplasia and from the main syndromes of congenital muscular dystrophy/cobblestone lissencephaly. Differences from the Walker-Warburg syndrome, which simulates it in severity, included the absence of severe hydrocephalus, normal creatine kinase (for age) and minimal (mainly periventricular) white matter abnormalities. The findings suggest either an independent entity, in the studied family, or an allelic variation of the cobblestone lissencephaly (type II lissencephaly) syndrome.
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PMID:Lethal congenital muscular dystrophy in two sibs with arthrogryposis multiplex: new entity or variant of cobblestone lissencephaly syndrome? 905 48

A survey was performed of magnetic resonance imaging (MRI) findings in 21 patients with congenital muscular dystrophy (CMD) with cerebral abnormalities to evaluate the contribution of MRI to the classification of CMD patients. In 5 patients with Walker-Warburg syndrome (WWS), MRI showed hydrocephalus due to aqueduct stenosis, generalized cerebral cortical agyric or pachygyric polymicrogyria, diffuse cerebral hemispheric white matter abnormalities, and malformations of posterior fossa structures. In 4 patients with muscle-eye-brain disease, MRI showed cortical dysplasia, but less severe than in WWS. The cerebral white matter either was normal or contained multiple focal abnormalities. Malformations of posterior fossa structures were present. Eight patients, classified as having classic merosin-deficient CMD (MD-CMD), had diffuse cerebral hemispheric white matter abnormalities, no other abnormalities. One patient with MD-CMD had only a few, focal white matter abnormalities. Three CMD patients had occipital agyria, otherwise normal gyration, multifocal or more diffuse cerebral white matter changes, and variable hypoplasia of pons and vermis. Two of the 3 patients had negative muscle merosin staining. The conclusion of the study is that MRI is an important adjunct in the classification of CMD patients. CMD with occipital agyria can be regarded as a newly recognized, separate CMD subtype.
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PMID:Magnetic resonance imaging in classification of congenital muscular dystrophies with brain abnormalities. 922 85


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