Anencephaly, dorsal hypermelia, and duplication of the vertebral column: a rare type of rachipagus conjoined twins.
Parasitic rachipagus conjoined twins with spina bifida, diplomyelia, scoliosis, tethered cord syndrome, and ventricular septal defect--case report.
Heteropagus (parasitic) twins: a review.
Rachipagus parasite associated with myelocystocele and diastematomyelia.