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Thrombocytosis in pediatric patients is associated with severe lower respiratory tract inflammation
Vasiliki Vlacha1, Gavriela Feketea
1Division of Pediatric Hematology-Oncology, Department of Pediatrics, University Hospital of Patras, Patras, Greece. vasovlaha@mail.gr
Insights
Thrombocytosis, or high platelet count, is common in pediatric lower respiratory tract infections and indicates a more severe illness. This finding is particularly linked to pleural effusion and can serve as a clinical marker for infection severity.
Area of Science:
- Pediatric infectious diseases
- Hematology
- Clinical pathology
Background:
- Secondary thrombocytosis is linked to various clinical conditions.
- Understanding its role in lower respiratory tract infections (LRTI) is crucial.
Purpose of the Study:
- To determine the incidence of thrombocytosis in pediatric LRTI.
- To analyze the clinical significance and prognostic value of thrombocytosis in LRTI.
Main Methods:
- A retrospective study of 102 pediatric patients hospitalized with LRTI over 30 months.
- Platelet counts were analyzed, with thrombocytosis defined as >500 x 10(9)/L.
Main Results:
- 48% of patients exhibited thrombocytosis.
- Thrombocytotic patients were younger and presented with more severe illness, including respiratory distress and longer hospital stays.
- Pleural effusion was almost exclusively observed in thrombocytotic patients.
Conclusions:
- Thrombocytosis is a frequent finding in pediatric LRTI, correlating with increased disease severity.
- The presence of thrombocytosis, especially with pleural effusion, may serve as a valuable clinical marker for LRTI severity.
Background:
Secondary thrombocytosis is associated with a variety of clinical conditions. The aim of this study was to determine the incidence and to analyze the clinical significance and prognostic value of thrombocytosis in lower respiratory tract infection.
Methods:
A total of 102 pediatric patients were hospitalized with lower respiratory tract infection during a period of 30 months.
Results:
Forty nine (48%) of those patients had platelet counts >500 x 10(9)/L. The median age of the thrombocytotic patients was 31 months as opposed to 61 months for the non-thrombocytotic ones. The patients with thrombocytosis had more serious illness. This is indicated by three factors: more severe clinical condition on admission, presence of respiratory distress and longer hospitalization. Sedimentation rate >70 mm/h was observed in 44.4% patients of the thrombocytotic group compared to only 27.7% of the non-thrombocytotic ones. Almost all patients with pleural effusion were thrombocytotic. The children with very high platelet counts >650 x 10(9)/L presented with respiratory distress on admission and required longer hospitalization time. No other significant clinical or laboratory differences were demonstrated between these patients and the remainder of the thrombocytotic patients.
Conclusions:
Thrombocytosis is a common finding among patients with lower respiratory tract infection. Thrombocytotic patients have a more severe clinical condition. Importantly, thrombocytosis occurs almost exclusively in patients with pleural effusion. The platelet count may be a useful clinical marker associated with the severity of the lower respiratory tract infection.
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