Twin pregnancy with hydatidiform mole and a coexistent live fetus

with a normal fetus and placenta. Twin pregnancies with partial hydatidiform mole coexisting with a live fetus are rarely reported, since fetuses identified with partial mole are generally triploid and tend to die in the first trimester.1,3,4 Hydatidiform mole with live fetus is associated with the risk of many maternal and fetal complications such as vaginal bleeding, preeclampsia, thromboembolic disease, hyperemesis, hyperthyroidism, fetal intrauterine demise, and a potentially lethal risk of gestational trophoblastic neoplasia.5,6 Management of such cases presents a dilemma to both the clinician as well as the patient. The possible risks that may ensue upon continuation of pregnancy must be weighed against the chances of fetal survival so as to facilitate a well-informed decision by the patient to opt between continuation and termination of pregnancy. An early diagnosis of this condition by high resolution ultrasound is important for clinical management and helps the patient in making a decision whether to terminate pregnancy or continue with close feto-maternal monitoring. We report a histopathologically confirmed case of partial hydatidiform mole with coexistent live fetus, diagnosed on a routine first trimester ultrasound.