Affected populations: The disorder is believed to affect somewhere between 1 in 12,000 and 1 in 24,000 people, although these figures may be underestimated. Many cases of Angelman syndrome can go ...

Shortly thereafter, diagnoses of Angelman syndrome began to rise. Today, the disorder is known to occur in approximately one in every 15,000 to 20,000 people, and it has been reported all over the ...