Glucose-6-phosphate dehydrogenase deficiency is also known as G6PD deficiency. It occurs when the body does not have enough of an enzyme called G6PD. This enzyme is needed to help the red blood cells (RBCs) do their job. The RBCs carry oxygen throughout the body. With G6PD deficiency, the RBCs are more likely to break down or be destroyed. If the body does not have enough healthy RBCs, it causes anemia. Your child’s healthcare provider can evaluate your child and discuss treatment options with you.
G6PD deficiency is inherited. This means that it is passed down from parent to child. When a child has this condition, parents and siblings should also be tested.
G6PD deficiency affects certain people more often than others. These include African Americans and people from the Mediterranean and Southeast Asia. It is also more common in males than females.
Certain things make symptoms more likely to develop. These are called triggers. They include:
Exposure to certain chemicals (such as naphthalene, found in mothballs)
Eating certain foods (such as fava beans)
Taking certain medicines (such as some types of antibiotics)
Having a bacterial or viral infection, or certain other illnesses
Most children have no symptoms at all. Or they only develop symptoms when exposed to certain triggers. These children generally have normal blood counts when not sick or exposed to a trigger. Other children have ongoing symptoms, even long-term (chronic) anemia. Possible symptoms include:
Sudden rise in body temperature
Lack of energy or tiring easily (fatigue)
Heavy, fast breathing
Weak, rapid heartbeat
Inability to do normal amounts of physical activity (exercise intolerance)
Dizziness or fainting
Yellowing of the skin, eyes, or mouth (jaundice)
Belly (abdominal) pain
Your child may be referred to a pediatric hematologist for diagnosis and treatment. This is a doctor who specializes in blood disorders (hematology). The doctor will examine your child and ask about your child’s symptoms, medicines, diet, and health and family history. Tests are also done. Most of the tests are done by taking a blood sample from a vein in the arm or from a finger or heel. Tests may include:
Complete blood cell count (CBC). This measures the amounts of types of cells in the blood.
Blood smear. This checks the size and shape of blood cells. A drop of blood is looked at with a microscope. A stain is added to make the parts of the blood cells easier to see.
Reticulocyte count. This measures the amount of new RBCs being made by the bone marrow.
Other blood tests. Specific blood tests are done to check the level of G6PD enzyme activity in the blood cells.
The goal of treatment is to remove the cause or trigger of your child’s symptoms. Discuss with the doctor how to help your child prevent symptoms. Some common triggers of G6PD deficiency include fava beans, mothballs, and tonic water. Also, certain medicines are triggers for symptoms. Ask the doctor for a list of these medicines and other triggers.
In severe cases, hospital care is needed to help manage symptoms.
In most cases, children with G6PD deficiency can learn to manage their condition. They can be as active and independent as other children. Tell all of your child’s healthcare providers, including the pharmacist, that your child has this condition.
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