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多指畸形

多指畸形
患有埃利伟氏症候群的病人,可见他的两手都是多指畸形及手指很短。
类型先天性障碍四肢的先天性畸形[*]non-syndromic polydactyly, syndactyly and/or hyperphalangy[*]Q61642689[*]疾病
分类和外部资源
医学专科医学遗传学
ICD-11LB78
ICD-10Q69
ICD-9-CM755.0
OMIM603598
DiseasesDB24853
MedlinePlus[1]
eMedicinederm/692
Orphanet2913
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多指畸形,或多趾畸形多指症,是一种涉及额外的手指或脚趾的先天畸形。

历史

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多出来的手指或脚趾一般都只是一细小的软组织,有时会有骨头但没有关节,很少会是完整结构的。额外的手指或脚趾一般是在尺骨那一面(即接近尾指)长出,很少会在桡骨(即拇指)那面,在中间三指间长出则极为罕见。这三种畸形分别称为轴后多指畸形、中央多指畸形及轴前多指畸形。它很多时会在原有的指上长出,很少会像正常的手指般在手腕长出。

多指症是常见的体染色体显性遗传,是最常见的先天性数字异常的手和脚。是先天畸形多种病征的其中一种,或是独有的病征。若是独有的话,很多时都是与单一基因突变有关,而非多因子性状的突变。[1] 不过,不同基因的突变均会引起多指畸形。

轴后多趾畸形的左脚。
中央多指畸形的右手。

每500个小孩就会有1个出现多指畸形。[2]非洲裔黑人小孩会较多患上轴后多指畸形,黑人男孩出现轴后多指畸形差不多是白人的10倍。一项研究发现每1000个白人男性中,就有2.3个患上多指畸形,而1000个白人女性中,则有0.6个患上;1000个黑人男性中,有13.5个会患有此病,1000个黑人女性中,则有11.1个患上。[3]

患病例子

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参考

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  1. ^ Penn State Milton S. Hershey Medical Center. Polydactyly and Syndactyly. 2004 [2009-02-09]. (原始内容存档于2010-03-07). 
  2. ^ Khanh-Van Le-Bucklin MD & Rebecca Hicks M.D. Polydactylism FAQ. 2008 [2009-02-09]. (原始内容存档于2009-02-03). 
  3. ^ Carter G Abel & Denise M McCarthy. Supernumerary Digit. 2008 [2009-02-09]. (原始内容存档于2008-09-21). 
  4. ^ Hrithik Roshan Factfile. [2009-02-09]. (原始内容存档于2007-02-03). 
  5. ^ 印度男婴长34只手指和脚趾 世界最多. [2011-07-25]. (原始内容存档于2011-07-23). 
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多指畸形
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