Mutations in Hirschsprung disease: when does a mutation contribute to the phenotype.

Abstract excerpt

Hirschsprung disease is a congenital disorder clinically characterized by the absence of colonic ganglia and genetically by extensive heterogeneity. Genes involved include RET, GDNF, EDNRB and EDN3. Mutations of these genes may give dominant, recessive, or polygenic patterns of inheritance. In particular in the case of missense mutations, it is therefore far from easy to assess whether a given mutation will...

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