Placental site trophoblastic tumor arising from antecedent molar pregnancy.

Journal Article (Journal Article;Review)

OBJECTIVE: Placental site trophoblastic tumor (PSTT) is a rare form of gestational trophoblastic disease. Little is known about its pathogenesis and natural history. METHODS: This report describes two cases that arose in patients with documented complete hydatidiform moles and summarizes the antecedent prenatal histories of PSTTs based on a detailed Medline literature analysis. CASES: A 28-year-old, G(2)P(2) female had a live, 12-week gestation fetus and a coexisting molar pregnancy. Her hCG levels dropped promptly from 1.5 million to 23,273 IU/ml after termination, but rose shortly thereafter together with the onset of recurrent vaginal bleeding. Curettage revealed persistent mole. Persistently elevated hCG led to hysterectomy disclosing a fundal PSTT. The second case was that of a 48-year-old, G(2) woman who presented with symptoms of preeclampsia, hyperthyroidism, and elevated hCG. Curettage yielded a complete hydatidiform mole. Although the hCG level decreased for a short period, it soon increased despite treatment with methotrexate. A second curettage revealed a PSTT. DISCUSSION: A Medline literature analysis of PSTT, which consists almost entirely of individual cases and several small series, disclosed that PSTT is preceded in 61% of cases by normal term pregnancy, 12% molar pregnancy, 9% spontaneous abortion, 8% therapeutic abortion, and 3% with ectopic pregnancy, stillbirths or preterm delivery. No information is known in 7%. This report describes two additional cases of PSTT preceded by complete molar pregnancy. CONCLUSIONS: PSTT is a well recognized, but uncommon form of gestational trophoblastic disease. Although little is known about its pathogenesis, it is preceded not uncommonly by an abnormal pregnancy, including a molar pregnancy.

Full Text

Duke Authors

Cited Authors

  • Moore-Maxwell, CA; Robboy, SJ

Published Date

  • February 2004

Published In

Volume / Issue

  • 92 / 2

Start / End Page

  • 708 - 712

PubMed ID

  • 14766272

International Standard Serial Number (ISSN)

  • 0090-8258

Digital Object Identifier (DOI)

  • 10.1016/j.ygyno.2003.10.048

Language

  • eng

Conference Location

  • United States