Comparison of the phenotypes of BWS and SGBS
| BWS | SGBS (in boys) | |
|---|---|---|
| Macroglossia | ++ | ++ |
| Abdominal wall defects | ++ | + |
| Visceromegaly | ++ | ++ |
| Hypoglycaemia | ++ | + |
| Embryonal tumours | +/(+) | +/(+) |
| Ear creases | ++ | ++ |
| Ear pits | + | ? |
| Flammeus naevus | ++ | ++ |
| Cleft lip/palate | (+) | + |
| Groved tongue/lip | ? | ++ |
| Facial outline | Round | Square |
| Coarsening facial gestalt | + | ++ |
| Genital anomalies | (+) | + |
| Congenital heart disease | (+) | + |
| Additional nipples | ? | + |
| Postaxial polydactyly | (+) | + |
| Syndactyly | (+) | + |
| Short/squared distal phalynx | ? | ++ |
| Final height increased | + | ++ |
Approximate frequency of anomalies: ++>50%, +5–50%, (+)<5%, ?frequency unclear but probably rare or absent.