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Main clinical features observed in Monosomy 18p syndrome
| Very frequent |
| mental retardation (variable severity) |
| speech delay |
| short stature |
| Frequent |
| variable features of the holoprosencephaly (HPE) spectrum |
| ptosis |
| flat nasal bridge |
| wide mouth with short upper lip |
| small mandible |
| excessive caries |
| large, protruding ears |
| short, webbed neck |
| broad trunk |
| pectus excavatum |
| kyphoscoliosis |
| Rare |
| behavioral disorders |
| autoimmune diseases |
| alopecia |
| dystonia |
