Dicephalus bipus tetrabrachius twinning report of a case.

This is a report of conjoined twins, Dicephalus Bipus. Tetrabrachius variety which are particularly rare. The diagnosis was suspected antenatally on the basis of radiologic criteria. They were delivered by caesarean section and died 4 hours after because of respiratory insufficiency. Clinical features, embryogenesis, diagnosis modalities and management of conjoined twins are reviewed in detail.