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Updated: Jun 12, 2026

A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level
Published on: January 19, 2024
Evaluation of anemia in children
Jennifer Janus1, Sarah K Moerschel
1Johns Hopkins Community Physicians, Hagerstown, MD, USA. jcox21@jhmi.edu
Insights
Anemia, a low hemoglobin level, is often asymptomatic in children and detected via screening. Classification depends on red blood cell size, guiding diagnosis and treatment for various anemia types.
Area of Science:
- Pediatrics
- Hematology
Background:
- Anemia is defined as hemoglobin below the 5th percentile for age, with varied causes.
- Most pediatric anemia cases are asymptomatic and found during screening, recommended for high-risk children.
Purpose of the Study:
- To outline the classification, evaluation, and management of anemia in children.
- To differentiate diagnostic approaches based on anemia morphology (microcytic, normocytic, macrocytic).
Main Methods:
- Classification based on mean corpuscular volume (MCV): microcytic, normocytic, macrocytic.
- Diagnostic workup includes screening, iron studies, lead levels, hemoglobin electrophoresis, reticulocyte count, vitamin B12, folate, and thyroid function tests.
- Peripheral smear analysis aids in evaluating anemia of any morphology.
Main Results:
- Mild microcytic anemia in 6-36 month olds with risk factors may be treated with oral iron.
- Severe or unresponsive anemia warrants investigation for gastrointestinal blood loss.
- Normocytic anemia evaluation depends on reticulocyte count, distinguishing hemolysis/blood loss from bone marrow disorders.
- Macrocytic anemia workup involves vitamin B12, folate, and thyroid function tests.
Conclusions:
- Anemia diagnosis and management in children are guided by MCV classification and specific laboratory evaluations.
- Prompt identification and appropriate workup are crucial for effective anemia treatment in pediatric populations.
Abstract:
Anemia is defined as a hemoglobin level of less than the 5th percentile for age. Causes vary by age. Most children with anemia are asymptomatic, and the condition is detected on screening laboratory evaluation. Screening is recommended only for high-risk children. Anemia is classified as microcytic, normocytic, or macrocytic, based on the mean corpuscular volume. Mild microcytic anemia may be treated presumptively with oral iron therapy in children six to 36 months of age who have risk factors for iron deficiency anemia. If the anemia is severe or is unresponsive to iron therapy, the patient should be evaluated for gastrointestinal blood loss. Other tests used in the evaluation of microcytic anemia include serum iron studies, lead levels, and hemoglobin electrophoresis. Normocytic anemia may be caused by chronic disease, hemolysis, or bone marrow disorders. Workup of normocytic anemia is based on bone marrow function as determined by the reticulocyte count. If the reticulocyte count is elevated, the patient should be evaluated for blood loss or hemolysis. A low reticulocyte count suggests aplasia or a bone marrow disorder. Common tests used in the evaluation of macrocytic anemias include vitamin B12 and folate levels, and thyroid function testing. A peripheral smear can provide additional information in patients with anemia of any morphology.
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