Phenotypic characteristics of F syndrome
| Phenotype | affected individual |
|---|---|
| Brachycephaly | 2/10 |
| Macrocephaly | 3/10 |
| Facies sign abnormal | 3/10 |
| Low/abnormal hairline | 4/10 |
| Dental hypoplasia/dysplasia | 7/10 |
| Wide alveolar ridge | 6/10 |
| High, narrow palate | 7/10 |
| Kyphosis | 3/10 |
| Spina bifida occulta | 5/10 |
| Pectus excavatum | 5/10 |
| Syndactyly involving thumb | 9/10 |
| Carpal fusion | 10/10 |
| Broad, bifid 1st toe | 10/10 |
| Tarsal fusion | 10/10 |
| Short, acromelic limbs | 1/10 |