WILLIAMS SYNDROME
... • Specific Language Impairment (SLI): – Language problems without any obvious cause. – fifty to seventy percent of children with SLI have at least one other family member with the disorder ...
... • Specific Language Impairment (SLI): – Language problems without any obvious cause. – fifty to seventy percent of children with SLI have at least one other family member with the disorder ...
Williams syndrome
Williams syndrome (WS), also known as Williams–Beuren syndrome (WBS), is a rare neurodevelopmental disorder characterized by: a distinctive, ""elfin"" facial appearance, along with a low nasal bridge; an unusually cheerful demeanor and ease with strangers; developmental delay coupled with strong language skills; and cardiovascular problems, such as supravalvular aortic stenosis and transient high blood calcium.It is caused by a deletion of about 26 genes from the long arm of chromosome 7. It occurs in 1 in 7,500 to 1 in 20,000 births. The syndrome was first identified in 1961 by New Zealander J.C.P. Williams.