FIGO staging for gestational trophoblastic neoplasia: 2026.

Gestational trophoblastic neoplasia (GTN) encompasses a wide range of diseases, which include choriocarcinoma, placental site trophoblastic tumor, epithelioid trophoblastic tumor, and post-molar persistent or rising levels of human chorionic gonadotrophin. Standardization of the diagnostic criteria and investigative approaches for this uncommon, potentially lethal, yet highly treatable disease is important. Adoption of an evidence-based staging and scoring system is essential to guide patient management and enable comparison of treatment outcomes. An updated staging system for GTN has been proposed and adopted by the Committee on Women's Cancer of the International Federation of Gynecology and Obstetrics (FIGO) for this purpose. This article highlights the changes introduced in the 2026 system and provide explanatory notes to facilitate interpretation.