Monochorionic twin fetus with VACTERL association after intracytoplasmic sperm injection.

We report a rare case of a monochorionic twin gestation after intracytoplasmic sperm injection (ICSI) in which one of the fetuses had VACTERL association. A 27-year-old woman became pregnant by ICSI and was found to have monochorionic twin fetuses. One fetus was noted to have the following anomalies: a multicystic, dysplastic left kidney with a hydroureter, and a dilated colon. A normal-sized stomach and normal amount of amniotic fluid were observed during the prenatal period with no other anomalies. The postnatal examination revealed hypospadias, and anal, esophageal, and duodenal atresia; thus, a diagnosis of VACTERL association was established. Although the prenatal diagnosis of this disorder is a challenge, even in a singleton, some of the characteristic features observed during antepartum ultrasonography may be a clue to the diagnosis, especially in a twin pregnancy after ICSI.