Clinical features of 32 cases of trisomy 20p1-150
| Fraction | Percentage | Our case | |
| Sex | 16F/16M | M | |
| Gestation | 21/25 (21=term) | Term | |
| Birth weight (g) | 1800–4300 | 2500 | |
| Growth normal | 15/21 | 71 | + |
| Mental retardation | 29/31 (moderate/severe) | 94 | + (moderate) |
| Poor coordination | 18/19 | 95 | + |
| Language delay | 21/22 | 95 | + |
| Occipital flattening | 11/22 | 50 | − |
| Low posterior hairline | 3/4 | 75 | − |
| Coarse hair | 14/18 | 78 | + |
| Thick, arched eyebrows | 2/2 | 100 | + |
| Epicanthus | 8/26 | 31 | + |
| Strabismus | 9/23 | 39 | − |
| Increased inner canthal distance | 11/21 | 52 | − |
| Upward slanting palpebral fissures | 19/29 | 66 | + |
| Round face, prominent cheeks | 24/29 | 83 | − |
| Short, upturned nose | 17/30 | 57 | − |
| Large flared nostrils | 16/30 | 53 | + |
| Large/abnormal ears | 11/11 | 100 | + |
| Moderate microganthia | 16/22 | 73 | + |
| High arched/cleft palate | 8/11 | 73 | + |
| Short neck | 5/5 | 100 | − |
| Cardiac anomalies | 10/28 | 36 | − |
| Renal anomalies | 6/8 | 75 | + |
| Vertebral anomalies | 17/21 | 81 | + |
| Osteopenia | 2/2 | 100 | + |
| Hip/pelvis anomalies | 6/6 | 100 | + |
| Digital anomalies | 12/13 | 92 | − |
| Feet anomalies | 14/15 | 93 | − |
| Dental anomalies | 13/19 | 68 | − |
| Umbilical/inguinal hernia | 6/7 | 86 | + |
+ : present, − : absent.
↵1-150 Taken from 32 cases described.1-6 8–10