Table 4.
Chromosomal abnormalities in the paediatric group
| Chromosomal abnormality | Number of patients |
| Trisomy 21 | 29 (3.5%) |
| Trisomy 18 | 7 (0.8%) |
| Trisomy 13 | 4 (0.5%) |
| 22q11 deletion | 4 (0.5%) |
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