[Thoracopagus conjoined twins: case study conducted in Libreville and literature review].

Conjoined twins are a rare form of monozygotic and monoamniotic twins. Fetal prognosis is very poor and, if the diagnosis is made early, it most often requires therapeutic abortion. We here report a case of three-hour old thoracopagus conjoined twins who were born vaginally, at term, at 40 weeks + 3 days. They were born to non-consanguineous parents, without any significant pathological history. Their mother was young and primiparous. She received 5 antenatal visits and 3 obstetric ultrasounds were performed by an inexperienced physician. The diagnosis of thoracopages twins was suspected based on clinical examination and computerized tomography (CT) results. This test showed cardiovascular abnormalities incompatible with life. The twins died after 23 hours of age due to acute respiratory distress. Conjoined twins are a rare congenital abnormality. Early diagnosis based on ultrasound would help to determine common anatomical structures, investigate associated congenital abnormalities, schedule delivery in a suitable structure and multidisciplinary neonatal management.