Table 1.
Classification of seven children with Costello syndrome.
| Syndrome | Patients (n) | Sex (n) |
Mean age (months) | Cerebellar tonsillar herniation (I RM) | Cerebellar tonsillar herniation (II RM) | Hydrocephalus | |
|---|---|---|---|---|---|---|---|
| M | F | ||||||
| Costello | 7 | 3 | 4 | 31 ± 16 | 5 | 7 | 0 |
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