raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:480851

Hereditary thrombocytopenia with early-onset myelofibrosis

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Neonatal
Status
active

A rare syndromic constitutional thrombocytopenia characterized by thrombocytopenia with increased bleeding tendency (leading to epistaxis, menorrhagia, and petechiae), in combination with myelofibrosis and splenomegaly. Platelets may be abnormally large or small and partly hypo- or agranular, plasma thrombopoietin is elevated, and the number of megakaryocytes in the bone marrow increased. Additional non-hematologic manifestations have been described in some patients, including mild bone abnormalities and facial dysmorphism with large forehead, hypertelorism, deep-set eyes, and wide nostrils.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enHereditary thrombocytopenia with early-onset myelofibrosis
frThrombocytopénie héréditaire avec myélofibrose à début précoce
deHereditäre Thrombozytopenie mit früh-beginnender Myelofibrose
esTrombocitopenia hereditaria con mielofibrosis de inicio precoz
itTrombocitopenia ereditaria con mielofibrosi ad esordio precoce
nlErfelijke trombocytopenie met myelofibrose met vroege aanvang
ptTrombocitopenia hereditária com mielofibrose de início precoce
plDziedziczna małopłytkowość z mielofibrozą o wczesnym początku
csHereditární trombocytopénie s časnou myelofibrózou
ukСпадкова тромбоцитопенія з раннім мієлофіброзом
zh遗传性血小板减少伴早发性骨髓纤维化
trErken başlangıçlı miyelofibroz ile seyreden kalıtsal trombositopeni

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM616937Evalidated
ICD-10D69.4NTBTattributedvalidated
ICD-113B64.01NTBTattributedvalidated
MONDO0014837Evalidated
UMLSC4310789Evalidated

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 (2):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
SRCDisease-causing germline mutation(s) (gain of function) inAssessedHGNC:11283ENSG0000019712219009020q11.23SRC proto-oncogene, non-receptor tyrosine kinase26936507[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families9 casesWorldwideCase(s)Validated26936507[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_26936507[PMID]

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

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card