xiphoomphaloischiopagus

xi·pho·om·pha·lo·is·chi·op·a·gus (zi″fo-) (zif″o-om″fə-lo-is″ke-opґə-gəs) [xipho- + omphalo- + ischio- + -pagus] conjoined twins united from the level of the xiphoid process to the ischia.