TY - CHAP M1 - Book, Section TI - Gestational Trophoblastic Neoplasia A1 - Lurain, John R. A2 - Boyiadzis, Michael M. A2 - Fojo, Tito Y1 - 2022 N1 - T2 - Hematology-Oncology Therapy, 3e AB - EpidemiologyGestational trophoblastic disease (GTD) is a spectrum of inter-related abnormal proliferations of the placental trophoblast, encompassing benign hydatidiform mole (complete and partial) as well as malignant gestational trophoblastic neoplasia (GTN), which includes invasive mole (IM), choriocarcinoma (CC), placental site trophoblastic tumor (PSTT), and epithelioid trophoblastic tumor (ETT)Complete Hydatidiform Mole (CHM)Incidence: 1 in 1000–2000 pregnancies in the United States and Europe, but higher in Asia and Latin AmericaRisk Factors: extremes of reproductive age (40), prior molar pregnancyGTN: develops in about 15–20% (12–18% IM and 2–3% CC) after molar evacuationPartial Hydatidiform Mole (PHM)Incidence: 3 in 1000 pregnanciesRisk Factors: possible history of irregular menses and prolonged oral contraceptive useGTN: develops in 1–5% after molar evacuation (almost all IM)ChoriocarcinomaIncidence: 1 in 40,000 pregnanciesRisk Factors: history of complete hydatidiform mole (1000× more likely to arise from a CHM, although one-half of cases develop from other pregnancy events)Common sites of metastasis: lungs (80%), brain (10%), liver (10%), vagina (~5%)PSTT/ETTIncidence: <0.2% of all cases of GTDRisk Factors: insufficient data exist to adequately characterize any risk factors; however, 95% develop following a term pregnancy or nonmolar abortion and may present many months or years later Lurain JR. Am J Obstet Gynecol 2010;203:531–539 SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/16 UR - hemonc.mhmedical.com/content.aspx?aid=1187881952 ER -