Cystic hygroma is a congenital malformation of the lymphatics. Nuchal translucency (NT) is markedly increased in cystic hygroma. Cystic hygroma is associated with aneuploidies, adverse obstetrical and perinatal outcomes. First-trimester nuchal NT measurement with the help of ultrasound is a widely used technique to determine the risk of fetal aneuploidy. Diagnosis should be made early and thoroughly in order to carry out chorionic villus sampling to determine the karyotype early.