Andermann syndrome
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Andermann syndrome is a disorder that damages the nerves used for muscle movement and sensation (motor and sensory neuropathy). The neuropathy in this condition is due to poor development of nerves, particularly nerves that control movement, which are half their normal size. Absence (agenesis) or malformation of the tissue connecting the left and right halves of the brain (corpus callosum) occurs in most people with this disorder. Because of these features, Andermann syndrome is sometimes referred to as hereditary motor and sensory neuropathy with agenesis of the corpus callosum (HMSN/ACC).
Beschreibung
Andermann syndrome is a disorder that damages the nerves used for muscle movement and sensation (motor and sensory neuropathy). The neuropathy in this condition is due to poor development of nerves, particularly nerves that control movement, which are half their normal size. Absence (agenesis) or malformation of the tissue connecting the left and right halves of the brain (corpus callosum) occurs in most people with this disorder. Because of these features, Andermann syndrome is sometimes referred to as hereditary motor and sensory neuropathy with agenesis of the corpus callosum (HMSN/ACC).
People affected by Andermann syndrome have abnormal or absent reflexes (areflexia) and weak muscle tone (hypotonia). They experience muscle wasting (amyotrophy), severe progressive weakness and loss of sensation in the limbs, and rhythmic shaking (tremors).
People with Andermann syndrome typically begin walking between ages 3 and 4, and worsening neuropathy causes them to lose this ability by their teenage years. As they get older, people with this disorder frequently develop joint deformities called contractures, which restrict the movement of certain joints. Most affected individuals also develop abnormal curvature of the spine (scoliosis), which may require surgery.
Andermann syndrome also results in abnormal function of certain cranial nerves, which emerge directly from the brain and extend to various areas of the head and neck. Cranial nerve problems may result in facial muscle weakness, drooping eyelids (ptosis), and difficulty following movements with the eyes (gaze palsy).
Individuals with Andermann syndrome usually have intellectual disability, which may be mild to severe, and some experience seizures. They may also develop psychiatric symptoms such as depression, anxiety, agitation, paranoia, and hallucinations, which usually appear in adolescence.
Some people with Andermann syndrome have atypical physical features such as widely spaced eyes (ocular hypertelorism); a wide, short skull (brachycephaly); a high arch of the hard palate at the roof of the mouth; a big toe that crosses over the other toes; and partial fusion (syndactyly) of the second and third toes.
Andermann syndrome is associated with a shortened life expectancy related to respiratory insufficiency, but affected individuals typically live into adulthood.
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
ACCPN
Agenesis of corpus callosum with neuronopathy
Agenesis of corpus callosum with peripheral neuropathy
Agenesis of corpus callosum with polyneuropathy
Charlevoix disease
Hereditary motor and sensory neuropathy with agenesis of the corpus callosum
HMSN/ACC
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Weiterführende Lektüre und Referenzen
- Andermann syndrome; MedlinePlus, National Library of Medicine.
- Auer RN, Laganiere JL, Robitaille YO, Richardson J, Dion PA, Rouleau GA, Shekarabi M. KCC3 axonopathy: neuropathological features in the central and peripheral nervous system. Mod Pathol. 2016 Sep;29(9):962-76. doi: 10.1038/modpathol.2016.90. Epub 2016 May 27.
- Dupre N, Bouchard JP, Brais B, Rouleau GA. Hereditary ataxia, spastic paraparesis and neuropathy in the French-Canadian population. Can J Neurol Sci. 2006 May;33(2):149-57. doi: 10.1017/s031716710000490x.
- Dupre N, Howard HC, Mathieu J, Karpati G, Vanasse M, Bouchard JP, Carpenter S, Rouleau GA. Hereditary motor and sensory neuropathy with agenesis of the corpus callosum. Ann Neurol. 2003 Jul;54(1):9-18. doi: 10.1002/ana.77777.
- Gauvreau C, Brisson JD, Dupre N. Hereditary Motor and Sensory Neuropathy with Agenesis of the Corpus Callosum. 2006 Feb 2 [updated 2020 Sep 17]. In: Adam MP, Bick S, Mirzaa GM, Wallace SE, Amemiya A, editors. GeneReviews(R) [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2026. Available from http://www.ncbi.nlm.nih.gov/books/NBK1372/
- Howard HC, Mount DB, Rochefort D, Byun N, Dupre N, Lu J, Fan X, Song L, Riviere JB, Prevost C, Horst J, Simonati A, Lemcke B, Welch R, England R, Zhan FQ, Mercado A, Siesser WB, George AL Jr, McDonald MP, Bouchard JP, Mathieu J, Delpire E, Rouleau GA. The K-Cl cotransporter KCC3 is mutant in a severe peripheral neuropathy associated with agenesis of the corpus callosum. Nat Genet. 2002 Nov;32(3):384-92. doi: 10.1038/ng1002. Epub 2002 Oct 7.
- Salin-Cantegrel A, Riviere JB, Dupre N, Charron FM, Shekarabi M, Karemera L, Gaspar C, Horst J, Tekin M, Deda G, Krause A, Lippert MM, Willemsen MA, Jarrar R, Lapointe JY, Rouleau GA. Distal truncation of KCC3 in non-French Canadian HMSN/ACC families. Neurology. 2007 Sep 25;69(13):1350-5. doi: 10.1212/01.wnl.0000291779.35643.15.
- Uyanik G, Elcioglu N, Penzien J, Gross C, Yilmaz Y, Olmez A, Demir E, Wahl D, Scheglmann K, Winner B, Bogdahn U, Topaloglu H, Hehr U, Winkler J. Novel truncating and missense mutations of the KCC3 gene associated with Andermann syndrome. Neurology. 2006 Apr 11;66(7):1044-8. doi: 10.1212/01.wnl.0000204181.31175.8b.
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3 Apr 2025 | Neueste Version
1 Sept 2022 | Ursprünglich veröffentlicht
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