Triploidy is a common cause of abortion and stillbirth. The incidence in live births is less than 1 in 20,000.1 Our investigation of a liveborn infant with 69,XXY karyotype disclosed certain hematological abnormalities that may be unique to this syndrome. The possible diagnostic value of these findings prompts this report.
For editorial comment see p 292.
Report of a Case.—A 29-year-old, gravida 3, para 2 woman was admitted to the hospital because of premature onset of labor and polyhydramnios. An ultrasound examination showed twin gestation and a possible omphalocele in both fetuses. An emergency cesarean section was carried out; pediatric surgeons were on call to attend the newborns. On delivery, one of the twins, a boy with an estimated gestational age of 32 weeks and weighing 1,320 g, was found to have a small omphalocele and multiple malformations, including a squarish skull with wide open fontanel and metopic