The Evolution of Methotrexate as a Treatment for Ectopic Pregnancy and Gestational Trophoblastic Neoplasia: A Review

Table 2

GTN FIGO staging and classification [30].

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