Table 1.

FIGO anatomic staging for gestational trophoblastic neoplasia (GTN).

Stage I	Disease confined to the uterus
Stage II	GTN extends outside of the uterus, but is limited to the genital structures (adnexa, vagina, broad ligament)
Stage III	GTN extends to the lungs, with or without known genital tract involvement
Stage IV	All other metastatic sites

FIGO: International Federation of Gynecology and Obstetrics.