P787: Prenatal diagnosis of capillary malformation-arteriovenous malformation syndrome in a dizygotic twin gestation

The patient opted to continue both pregnancies. Expectant management was pursued with serial ultrasound for hydrops assessment. At 30 weeks gestation, twin 1 was noted to have polyhydramnios, large pleural effusion, and bilateral renal pelvis dilatation. The patient continued hydrops assessment as well as antenatal surveillance at that time for both twins. Fetal hydrops in twin 1 ultimately developed at 32 weeks gestation. Given the poor prognosis for twin 1, counseling included options for ongoing surveillance of both fetuses with increased risk of prematurity for both twins or surveillance for twin 2 alone with increased risk of stillbirth for twin 1.