Gestational trophoblastic neoplasia can develop after which events?

• A. Normal pregnancy
• B. Molar pregnancy
• C. Miscarriage
• D. All of the above

Answer: (D)

Gestational trophoblastic neoplasia (GTN) arises from malignant transformation of placental trophoblastic tissue. This neoplasia can develop after any pregnancy event that involves trophoblastic tissue, not just after molar pregnancies. After a molar pregnancy, the risk is higher because abnormal trophoblast tissue is present, but GTN can also arise following a normal pregnancy or after a miscarriage. In all these scenarios, persistent or rising hCG after the pregnancy, along with possible abnormal bleeding or metastasis, signals GTN. Because GTN can follow any type of gestation, the correct answer is all of the above.