Related Experiment Video
Updated: Mar 21, 2026
Continuous Manual Exchange Transfusion for Patients with Sickle Cell Disease: An Efficient Method to Avoid Iron Overload
Published on: March 14, 2017
Congenital erythrocytosis
1Department of Haematology, Belfast City Hospital, Queen's University Belfast, Belfast, UK.
Insights
Congenital erythrocytosis, present from birth, can stem from primary defects or secondary causes like abnormal oxygen sensing. Diagnosis involves molecular investigation, though a cause remains unidentified in many cases.
Area of Science:
- Hematology
- Genetics
- Pediatrics
Background:
- Congenital erythrocytosis is a rare condition present at birth, often diagnosed in childhood or early adulthood.
- It can be primary, involving erythroid compartment defects, or secondary, caused by increased erythropoietin production.
- Family history may be present in affected individuals.
Purpose of the Study:
- To review the causes, diagnostic approaches, and management of congenital erythrocytosis.
- To highlight the role of molecular investigations in identifying genetic defects.
- To discuss potential complications and therapeutic strategies.
Main Methods:
- Review of primary causes including erythropoietin receptor mutations.
- Investigation of congenital secondary causes involving oxygen-sensing pathways and abnormal hemoglobin oxygen affinity.
- Diagnostic procedures include erythropoietin levels, oxygen dissociation curves, hemoglobin electrophoresis, and gene sequencing.
Main Results:
- Identification of known or novel molecular variants confirms congenital erythrocytosis.
- Nonspecific symptoms can occur, and major thromboembolic events have been reported.
- Therapeutic options include low-dose aspirin and venesection.
Conclusions:
- Congenital erythrocytosis is a rare condition often presenting in young individuals.
- Molecular investigations can identify underlying genetic lesions.
- In a majority of cases, no specific genetic defect is currently identified.
Introduction:
Congenital erythrocytosis is by definition present from birth. Patients frequently present in childhood or as young adults and a family history may be present. The erythrocytosis can be primary where there is a defect in the erythroid compartment of secondary where increased erythropoietin production produced due to the defect leads to an erythrocytosis.
Material And Methods:
Primary causes include erythropoietin receptor mutations. Congenital secondary causes include mutations in the genes involved in the oxygen-sensing pathway and haemoglobins with abnormal oxygen affinity. Investigations for the cause include an erythropoietin level, oxygen dissociation curve, haemoglobin electrophoresis and sequencing for known gene variants.
Results:
The finding of a known or new molecular variant confirms a diagnosis of congenital erythrocytosis. A congenital erythrocytosis may be an incidental finding but nonspecific symptoms are described. Major thromboembolic events have been noted in some cases. Low-dose aspirin and venesection are therapeutic manoeuvres which should be considered in managing these patients.
Conclusions:
Rare individuals presenting often at a young age may have a congenital erythrocytosis. Molecular investigation may reveal a lesion. However, in the majority, currently no defect is identified.
More Related Videos
08:53Author Spotlight: Advancing Erythropoiesis Research - A Simplified Pipeline for Assessing Hematopoietic Stem Cell Function in Myelodysplastic Syndromes
Published on: January 10, 2025
08:23Characterization of Sickling During Controlled Automated Deoxygenation with Oxygen Gradient Ektacytometry
Published on: November 5, 2019
Related Concept Videos
01:27Disorders 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...
01:14Erythropoiesis
01:14Erythropoiesis
01:24Factors Affecting Erythropoiesis
Several factors influence the erythrocyte production rate, with tissue oxygen level being among the most critical. Intense exercise or high altitudes can cause tissue hypoxia, which triggers the kidneys to release more erythropoietin (EPO) into the bloodstream.
EPO then...
01:22Lifecycle of Erythrocytes
The resident phagocytic macrophages deal with these damaged cells by engulfing them and separating their globin and heme groups....
01:20Inborn Errors of Metabolism