Clinical feature: 

Definition: The Frasier syndrome is an autosomal dominant disorder. It's clinical features comprise progessive renal disease and male pseudohermaphroditism. The reason for this disorder is a heterozygous germline mutation affecting one of the four splice variants of the WT1 gene.

Pathogenesis: The disease is caused by a splice mutation an alternative splice site in intron 9. This leads to domination of a the splice variant without an additional 3 amino acids KTS between the third and fourth zinc finger. The disturbed KTS+/+ ratio is responsible for the phenotype.

Literature: 

Barbaux S et al. (1997) Donor splice-site mutations in WT1 are responsible for Frasier syndrome.
Klamt B et al. (1998) Frasier syndrome is caused by defective alternative splicing of WT1 leading to an altered ratio of WT1 +/-KTS splice isoforms.