Orphanet: Placental site trophoblastic tumor

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Placental site trophoblastic tumor

Disease definition

A rare gestational trophoblastic neoplasm characterized histologically by invasion of myometrium by intermediate trophoblastic cells without chorionic villi and containing human placental lactogen hormone (hPL). Tissue necrosis is usually absent and hemorrhage is mild. The tumor develops from the placental implantation site and always occurs following pregnancy, voluntary termination of pregnancy (VTP) or miscarriage. Indicative signs are irregular metrorrhagia some time after spontaneous miscarriage or VTP, presence of metastasis or unexplained metrorrhagia in the weeks and months following normal childbirth or ectopic pregnancy.


Classification level: Disorder
  • Synonym(s):
    • PSST
  • Prevalence: <1 / 1 000 000
  • Inheritance: Not applicable 
  • Age of onset: Adult
  • ICD-10: D39.2
  • ICD-11: 2F31.2  2F76  2F96  XH1RM5
  • OMIM: -
  • UMLS: C0206666
  • MeSH: D018245
  • GARD: -
  • MedDRA: -

Detailed information


ERN : produced/endorsed by ERN(s)
FSMR : produced/endorsed by FSMR(s)
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