This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
Snowstorm appearance in sonography is characteristic of 
Select and explain. 
A. Complete molar pregnancy, B. Ectopic pregnancy, C. Incomplete aboion, D. Missed aboion
A: Complete molar pregnancy
Answer: A: Complete molar pregnancy 
Explanation: 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 "snowstorm"Paial mole has features that include a thickened, multicystic placenta along with a fetus or at least fetal tissueReference: William's Obstetrics; 25th edition, chapter 20; Gestational trophoblastic diseases