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Thrombocytosis in childhood
1Universitäts-Kinderklinik, Freiburg, Germany.
Seminars in Thrombosis and Hemostasis
|January 1, 1995
Summary
Childhood thrombocytoses, defined as high platelet counts, are common (3-13%) in pediatric hospitals, mostly secondary to infections or other conditions. Thrombotic risks are minimal unless other factors are present.
Area of Science:
- Pediatric Hematology
- Oncology
Background:
- Childhood thrombocytoses were historically considered rare, with limited and conflicting literature.
- Thrombocytosis is defined as a platelet count >500 x 10(9)/L.
Purpose of the Study:
- To review the occurrence, causes, and implications of childhood thrombocytoses.
Main Methods:
- Literature review of studies on childhood thrombocytoses.
- Analysis of platelet counts and associated conditions.
Main Results:
- Thrombocytosis occurs in 3-13% of pediatric hospital admissions, predominantly secondary.
- Common causes include infections, trauma, surgery, hypoxemia, and gastrointestinal disorders.
- Secondary thrombocytosis is typically transient, with platelet counts <800 x 10(9)/L, and rarely causes thrombosis unless other risk factors exist.
Conclusions:
- Secondary thrombocytoses are common in children and usually benign.
- Antithrombotic prophylaxis is generally not required for isolated childhood thrombocytoses.