Meckel syndrome
Dernière mise à jour 18 Aug 2020
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Meckel syndrome is a disorder with severe signs and symptoms that affect many parts of the body. The most common features are enlarged kidneys with numerous fluid-filled cysts; an occipital encephalocele, which is a sac-like protrusion of the brain through an opening at the back of the skull; and the presence of extra fingers and toes (polydactyly). Most affected individuals also have a buildup of scar tissue (fibrosis) in the liver.
Description
Meckel syndrome is a disorder with severe signs and symptoms that affect many parts of the body. The most common features are enlarged kidneys with numerous fluid-filled cysts; an occipital encephalocele, which is a sac-like protrusion of the brain through an opening at the back of the skull; and the presence of extra fingers and toes (polydactyly). Most affected individuals also have a buildup of scar tissue (fibrosis) in the liver.
Other signs and symptoms of Meckel syndrome vary widely among affected individuals. Numerous abnormalities of the brain and spinal cord (central nervous system) have been reported in people with Meckel syndrome, including a group of birth defects known as neural tube defects. These defects occur when a structure called the neural tube, a layer of cells that ultimately develops into the brain and spinal cord, fails to close completely during the first few weeks of embryonic development. Meckel syndrome can also cause problems with development of the eyes and other facial features, heart, bones, urinary system, and genitalia.
Because of their serious health problems, most individuals with Meckel syndrome die before or shortly after birth. Most often, affected infants die of respiratory problems or kidney failure.
Inheritance patterns
The source lists the following possible inheritance patterns: Autosomal recessive. More than one pattern can apply in different cases.
Related genes
Other names
Dysencephalia splanchnocystica
Meckel-Gruber syndrome
MKS
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Lectures complémentaires et références
- Meckel syndrome; MedlinePlus, National Library of Medicine.
- Logan CV, Abdel-Hamed Z, Johnson CA. Molecular genetics and pathogenic mechanisms for the severe ciliopathies: insights into neurodevelopment and pathogenesis of neural tube defects. Mol Neurobiol. 2011 Feb;43(1):12-26. doi: 10.1007/s12035-010-8154-0. Epub 2010 Nov 27.
- Salonen R, Kestila M, Bergmann C. Clinical utility gene card for: Meckel syndrome. Eur J Hum Genet. 2011 Jul;19(7). doi: 10.1038/ejhg.2010.255. Epub 2011 Feb 2. No abstract available.
- Salonen R, Paavola P. Meckel syndrome. J Med Genet. 1998 Jun;35(6):497-501. doi: 10.1136/jmg.35.6.497.
- Tallila J, Salonen R, Kohlschmidt N, Peltonen L, Kestila M. Mutation spectrum of Meckel syndrome genes: one group of syndromes or several distinct groups? Hum Mutat. 2009 Aug;30(8):E813-30. doi: 10.1002/humu.21057.
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