The diagnosis of molar pregnancy can nearly always be made by ultrasound, because the chorionic villi of a typical complete mole proliferate with vacuolar swelling and produce a characteristic vesicular sonographic pattern.
• Previously when the diagnosis was made at a later stage, the classical ‘snowstorm’ pattern of the uterus was described; however this is not commonly seen now.
Scan of the uterus shows the classical bunch-of-grapes appearance or snow-storm appearance in the uterine cavity is noted. This is the typical appearance of a gestational trophoblastic disease.
• Benson et al reported that the majority of first trimester complete moles demonstrated a typicalsonographic appearance of a complex and echogenic intrauterine mass containing many small
cystic spaces {which correspond to the hydropic villi on gross pathology}.
