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Start free with EleplanHereditary thrombocytopenia with early-onset myelofibrosis
ORPHA:480851Disease
What it is
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.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Neonatal
- Inheritance
- Autosomal dominant
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
Gene
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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