TABLE V.
Number and Proportion of Major Congenital Malformations Unrelated to the Site of Union Observed in 73 Sets of Conjoined Twins
| Malformation | Thoracopagus | Parapagus Dicephalus | Omphalopagus | Parasitic | Craniopagus | Parapagus Diprosopus | Cephalopagus | Ischiopagus | Pygopagus | Total | % |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Neural tube defects | 4 | 3 | 0 | 0 | 0 | 3 | 0 | 0 | 1 | 11 | 9.91 |
| Hydrocephaly | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 3.60 |
| Other central nervous system defects | 1 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 4.50 |
| Micro-ophthalmia | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.90 |
| Facial clefts | 5 | 1 | 2 | 0 | 0 | 2 | 1 | 0 | 0 | 11 | 9.91 |
| Congenital heart defects | 0 | 1 | 2 | 1 | 0 | 0 | 0 | 1 | 2 | 7 | 6.31 |
| Gastrointestinal atresias | 1 | 3 | 2 | 1 | 1 | 1 | 1 | 0 | 1 | 11 | 9.91 |
| Abdominal wall defects | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 2 | 0 | 4 | 3.60 |
| Genitourinary defects | 6 | 1 | 5 | 1 | 1 | 1 | 1 | 2 | 4 | 22 | 19.82 |
| Musculoskeletal anomalies | 6 | 3 | 2 | 0 | 1 | 0 | 0 | 2 | 0 | 14 | 12.61 |
| Limb reduction anomalies | 5 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 7 | 6.31 |
| Polydactyly/syndactyly | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1.80 |
| Other | 5 | 2 | 2 | 2 | 0 | 1 | 0 | 0 | 0 | 12 | 10.81 |
| Total | 37 | 18 | 17 | 7 | 5 | 8 | 3 | 7 | 9 | 111 | 100.00 |