Some observations on conjoined twins

ABSTRACT

The anatomy and embryology of conjoined twinning was studied using five specimens. The partners in all the specimens were joined at thorax and abdomen [thoracoomphalopagus]. Internally, the heart, liver, diaphragm and gut, were the major conjoined structures. There was no correlation between the degree of external fusion and the conjoining of internal organs. The anatomical features of the conjoined organs suggest that mechanical factors may have contributed to the conjoining process or to the final position of the conjoined organs as well as the surrounding viscera