Related Experiment Video
Updated: Jul 28, 2025

Megakaryocyte Differentiation and Platelet Formation from Human Cord Blood-derived CD34+ Cells
Published on: December 27, 2017
Thrombocytosis in children.
Altay Babacan1, Feray Ferda Şenol2
1Ufuk University, Faculty of Medicine, Department of Pediatric Hematology and Oncology - Ankara, Turkey.
Infections were the leading cause of thrombocytosis in pediatric patients, followed by sickle cell anemia and iron deficiency anemia. This study highlights key conditions to consider in diagnosing elevated platelet counts in children.
Area of Science:
- Pediatric Hematology
- Oncology
- Clinical Medicine
Background:
- Thrombocytosis, an elevated platelet count, can indicate various underlying health conditions.
- Understanding the causes of thrombocytosis in pediatric populations is crucial for accurate diagnosis and management.
Purpose of the Study:
- To determine the frequency and identify the primary causes of thrombocytosis in children admitted to a pediatric hematology and oncology department.
- To analyze demographic and hematologic parameters associated with thrombocytosis in this cohort.
Main Methods:
- A retrospective analysis of laboratory data from 2,500 pediatric patients admitted between 2019 and 2021.
- Identification of 319 patients with thrombocytosis (platelet count > 450,000/μL).
- Recording and analysis of demographic data, hematologic parameters, and final diagnoses.
Main Results:
- Thrombocytosis was observed in 12.76% of the studied pediatric patients.
- Infections were the most frequent cause (37.9%), followed by sickle cell anemia (21%) and iron deficiency anemia (15.4%).
- Other identified causes included colloid tissue disease, hemolytic anemia, and post-splenectomy states.
Conclusions:
- Infections are the predominant cause of secondary thrombocytosis in pediatric patients.
- Sickle cell anemia and iron deficiency anemia are significant contributors and should be considered in the differential diagnosis of pediatric thrombocytosis.
Related Concept Videos
Disorders of Hemostasis
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Structure and Function of Platelets
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000...
Venous Thrombosis I: Introduction
Venous Thrombosis III: Interprofessional Care
Disorders of Erythrocytes
Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions.
A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts.
On the other...
Anticoagulant Drugs: Low-Molecular-Weight Heparins

