Cephalothoracopagus syncephalus: a case report with previously unreported anatomical abnormalities and chromosomal analysis.

A case of cephalothoracopagus conjoined twins is presented. The abnormality was detected antenatally by the use of ultrasonography. A detailed anatomical description is given, including previously unreported abnormalities of the cerebrum and genito-urinary tract. Chromosomal analysis was also performed. This showed a pericentric inversion of one chromosome 9 in the fetus. Studies performed on the mother showed pericentric inversion of both chromosome 9s. A comparison of this case with previously reported cases in the literature is then given.

[Conjoined twins. Report of two cases (author's transl)]. / Gemelos monocigóticos unidos. Aportación de dos nuevos casos.

This work is basically a clinical, radiological and anatomopathological study of two new cases of biaxial, thoracopagus, omphalopagus, conjoined monozygotic twins. Necropsy shows a single heart, diaphragm, liver and umbilical cord in both cases. Ethiopathogenical theories are analyzed, and a simplified classification is established according to the type of union and shared area.