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Williams-Beuren syndrome

Williams-Beuren syndrome is a genetic disorder caused by hemizygous deletion of 1.5 to 1.8 Mb on chromosome 7q11.23, including the elastin gene. The clinical picture includes facial dysmorphisms and disturbances in many internal organs. The kidney is affected by nephrocalcinosis and nephrolithiasis.

Epidemiology

The incidence of Williams-Beuren syndrome is estimated at 1:10,000 live births.[Error: Macro 'ref' doesn't exist]

Symptoms

Dysmorphism
Facial dysmorphic feature include depressed nasal bridge, prominent epicanthal folds, anteverted nares, and prominent lips.
Nephrocalcinosis
Nephrocalcinosis and urolithiasis are the major renal symptoms of Williams-Beuren syndrome.

Systematic

Nephrocalcinosis
Bartter syndrome
Dent disease
Hereditary Rickets
Hyperoxaluria
Hypomagnesemia with hypercalciuria and nephrocalcinosis
Hypomagnesemia with hypercalciuria and nephrocalcinosis with ocular involvement
Infantile hypercalcemia
Lowe disease
Renal tubular acidosis
Williams-Beuren syndrome
ELN

References:

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Duba HC et al. (2002) The elastin gene is disrupted in a family with a balanced translocation t(7;16)(q11.23;q13) associated with a variable expression of the Williams-Beuren syndrome.

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Wikipedia article

Wikipedia EN (Williams_syndrome) external link
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