Anatomical basis of femoral component sizing of total knee arthroplasty

Abstract

Conjoined twins are a rare congenital anomaly of twinning which borders on monstrosity. Of the various types of conjoined twins, thoraco-omphalopagus is a commonly occurring type. A recent theory postulates fusion of two embryonic discs as more of a cause for conjoined twinning than fission of a single embryonic plate. In this paper, the findings of a pair thoraco-omphalopagus twins are outlined with a review of the embryological theories that surround their formation.