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    Prenatal diagnosis of a rare type of conjoined twin, cephalothoracoomphalopagus : a case report
    (2021) Ceylan, Yasin; Akar, Bertan; Yaman, İlteriş; Akkaya, Selim
    Conjoined twins are a rare outcome of a monoamniotic and monochorionic gestation. We present a case of cephalothoracoomphalopagus conjoined twin diagnosed by prenatal ultrasonographic examination. A 26-yearold gravida 2, para 1 woman was referred to our perinatology unit for evaluation because of suspected conjoined twins at 24 weeks of gestation. Her medical history was unremarkable. There was no family history of genetic abnormalities. The diagnosis of conjoined twins was confirmed by prenatal ultrasonographic examination. Conjoined twins occur when two identical individuals are joined by part of their anatomy and share their vital one or more organs. The incidence of conjoined twins ranges from 1:50,000 to 1:250,000 live births. We present a case of male cephalothoracoomphalopagus conjoined twin, which is extremely rare type of conjoined twins. A prenatal diagnosis of shared organs dictates pregnacy termination or possible surgical separation strategies.
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    Prenatal diagnosis of twin reversed arterial perfusion (trap) sequence: a case report
    (2021) Ceylan, Yasin; Akar, Bertan; Yaman, İlteriş; Akkaya, Selim
    Twin reversed arterial perfusion (TRAP) sequence is a rare condition of monochorionic twin pregnancy. It has an incidence of 1:35.000 pregnancies and constitutes 1% all monochorionic pregnancies. The etiopathogenetic mechanisms are not well defined. There is co-existence of a normal pump twin and an acardiac recipient twin. A 22-year-old nulliparous woman was referred with TRAP sequence. The prognosis in TRAP sequence is lethal for acardiac twin and the fetal mortality of the pump twin is very high due to the cardiac failure. The obstetrician should be aware of TRAP-sequence in twin/multiple pregnancies.