raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:99928

Placental site trophoblastic tumor

Synonyms: PSST

Type
Disease
Group
Disorder
Inheritance
Not applicable
Age of onset
Adult
Status
active

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.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enPlacental site trophoblastic tumorPSST
frTumeur du site d'implantationTumeur trophoblastique placentaire
dePlazentabett-TumorPSST · Trophoblastentumor am Plazentaansatz
esTumor trofoblástico del sitio placentario
itTumore trofoblastico della placenta
nlTrofoblasttumor aan implantatiezijde van placenta= en
ptTumor trofoblástico do local da placenta (PSST)
plGuz trofoblastyczny miejsca łożyskowego= en
csCytotrofoblastický choriokarcinom= en
ukТрофобластична пухлина плацентарної ділянки= en
zh胎盘部位滋养细胞肿瘤= en
trPlasental bölge trofoblastik tümör= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10D39.2NTBTindexvalidated
ICD-112F31.2NTBTindexvalidated
ICD-112F76NTBTindexvalidated
ICD-112F96NTBTindexvalidated
ICD-11XH1RM5Especificvalidated
MONDO0020552Evalidated
MeSHD018245Evalidated
UMLSC0206666Evalidated
GARD7403Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

3 records
TypeClassValueAreaQualificationValidationSource
Annual incidence<1 / 1 000 0000.02 / 100 000EuropeValue and classValidatedRARECARE surveillance of rare cancers in Europe[OTHER]
Lifetime Prevalence1-9 / 1 000 0000.86 / 100 000EuropeValue and classValidated22033323[PMID]_RARECARE surveillance of rare cancers in Europe[OTHER]
Point prevalence<1 / 1 000 000—EuropeClass onlyNot yet validatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

4 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0000141Amenorrhea
HP:0011434Low maternal serum chorionic gonadotropin
HP:0100608Metrorrhagia
HP:0005268Spontaneous abortion

Run the differential on the 4 obligate / very frequent terms

Annotation source: 14614893[PMID]

7

Sources for this card