In general, the prognosis is very good. Children with BWS usually do very well and grow up to become the heights expected based on their parents' heights. While children with BWS are at increased risk of childhood cancer, most children with BWS do not develop cancer and the vast majority of children who do develop cancer can be treated successfully. Children with BWS for the most part had no significant delays when compared to their siblings. However, some children with BWS do have speech problems that could be related to macroglossia or hearing loss. Advances in treating neonatal complications and premature infants in the last twenty years have significantly improved the true infant mortality rate associated with BWS. In a review of pregnancies that resulted in 304 children with BWS, no neonatal deaths were reported. This is compared to a previously reported mortality rate of 20%. The data from the former study was derived from a BWS registry, a database that may be slightly biased towards involving living children; however, death was not an exclusion criterion to join the registry. This suggests that while infants with BWS are likely to have a higher than normal infant mortality risk, it may not be as high as 20%.
Beckwith–Wiedemann syndrome
Wiedemann–Rautenstrauch syndrome
Wiedemann–Steiner syndrome
Weismann-Netter–Stuhl syndrome
Laurence–Moon syndrome
Prader–Willi syndrome
Wilson–Turner syndrome
Bardet–Biedl syndrome