<prompt> Snowstorm appearance in sonography is characteristic ofComplete molar pregnancyEctopic pregnancyIncomplete aboionMissed aboion  <response>: Sonographically, a complete mole appears as an echogenic uterine mass with numerous anechoic cystic spaces but without a fetus or amniotic sac. The appearance is often described as a snowstormPaial mole has features that include a thickened, multicystic placenta along with a fetus or at least fetal tissueReference: Williams Obstetrics; 25th edition, chapter 20; Gestational trophoblastic diseases 