Beckwith–Wiedemann syndrome is classified as an overgrowth syndrome and it affects many parts of the body. An overgrowth syndrome means that infants who are affected are larger than normal and throughout childhood tend to be taller than their peers however growth typically slows by about age 8.
Some of the common features used to define BWS are:
- Large tongue (Macroglossia)
- Above average birth weight and length (Macrosomia )
- Midline abdominal wall defects (omphalocele/exomphalos, umbilical hernia, diastasis recti),
- Ear creases or ear pits
- Low blood sugar after birth (Neonatal hypoglycemia)