Anales españoles de pediatría
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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.