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Familial essential thrombocythemia.

M E Eyster, S L Saletan, E M Rabellino

The American Journal of Medicine

|March 1, 1986

Summary

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Familial essential thrombocythemia, a rare myeloproliferative disorder, was identified in three generations of one family. This genetic condition shows autosomal dominant inheritance and favorable long-term survival in young patients.

Area of Science:

Hematology
Genetics
Oncology

Background:

Essential thrombocythemia (ET) is a rare myeloproliferative neoplasm.
Familial occurrence of ET is exceptionally uncommon, with limited prior documentation.
Understanding the genetic basis of ET is crucial for diagnosis and management.

Observation:

The study documented essential thrombocythemia in five individuals across three generations.
Affected individuals spanned ages 2 to 62, exhibiting varied clinical presentations.
Key clinical features included thrombocytosis, splenomegaly, and abnormal platelet aggregation.

Findings:

Bone marrow examination revealed increased megakaryocytes without atypia.
Platelet function tests, including arachidonic acid metabolite production, were normal.

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Genetic analysis confirmed a normal female karyotype, suggesting non-chromosomal abnormalities.

Implications:

The findings support essential thrombocythemia as a myeloproliferative disorder with autosomal dominant inheritance.
This study highlights the potential for long survival in untreated young women and children with ET.
Further research into the genetic underpinnings of familial ET is warranted.