Feature 

Complete mole 

Partial mole 

Karyotype 

46 XX 

Triploid, 69, XXY 

Villous edema 

All villi 

Some villi 

Trophoblast proliferation 

Diffuse, circumferential 

Focal, slight 

Atypia 

Often present 

Absent 

Serum hCG 

Elevated 

Less elevated 

hCG in tissue 

++++ 

+ 

Behavior 

2% choriocarcinoma 

Rare choriocarcinoma 

Fetal parts 

Rarely seen 

More common