Learn more about the causes and treatment of Reye's syndrome, a rare but serious condition causing swelling in the liver and brain.
Reye's (Reye) syndrome is a rare but serious condition that causes swelling in the liver and brain. Reye's syndrome most often affects children and teenagers recovering from a viral infection, most commonly the flu or chickenpox.
Signs and symptoms such as confusion, seizures and loss of consciousness require emergency treatment. Early diagnosis and treatment of Reye's syndrome can save a child's life.
Aspirin has been linked with Reye's syndrome, so use caution when giving aspirin to children or teenagers for fever or pain. Though aspirin is approved for use in children older than age 3, children and teenagers recovering from chickenpox or flu-like symptoms should never take aspirin.
For the treatment of fever or pain, consider giving your child infants' or children's over-the-counter fever and pain medications such as acetaminophen (Tylenol, others) or ibuprofen (Advil, Motrin, others) as a safer alternative to aspirin. Talk to your doctor if you have concerns.
In Reye's syndrome, a child's blood sugar level typically drops while the levels of ammonia and acidity in his or her blood rise. At the same time, the liver may swell and develop fatty deposits. Swelling may also occur in the brain, which can cause seizures, convulsions or loss of consciousness.
The signs and symptoms of Reye's syndrome typically appear about three to five days after the onset of a viral infection, such as the flu (influenza) or chickenpox, or an upper respiratory infection, such as a cold.
For children younger than age 2, the first signs of Reye's syndrome may include:
For older children and teenagers, early signs and symptoms may include:
As the condition progresses, signs and symptoms may become more serious, including:
These signs and symptoms require emergency treatment.
Early diagnosis and treatment of Reye's syndrome can save a child's life. If you suspect that your child has Reye's syndrome, it's important to act quickly.
Seek emergency medical help if your child:
Contact your child's doctor if your child experiences the following after a bout with the flu or chickenpox:
The exact cause of Reye's syndrome is unknown, although several factors may play a role in its development. Reye's syndrome seems to be triggered by using aspirin to treat a viral illness or infection — particularly flu (influenza) and chickenpox — in children and teenagers who have an underlying fatty acid oxidation disorder.
Fatty acid oxidation disorders are a group of inherited metabolic disorders in which the body is unable to break down fatty acids because an enzyme is missing or not working properly. A screening test is needed to determine if your child has a fatty acid oxidation disorder.
In some cases, the symptoms and signs of Reye's syndrome may be duplicated by an underlying metabolic condition unmasked by a viral illness. The most frequent of these rare disorders is medium-chain acyl-CoA dehydrogenase (MCAD) deficiency. Exposure to certain toxins — such as insecticides, herbicides and paint thinner — may produce symptoms similar to those of Reye's syndrome, but these toxins don't cause Reye's syndrome.
The following factors — usually when they occur together — may increase your child's risk of developing Reye's syndrome:
Most children and teenagers who have Reye's syndrome survive, although varying degrees of permanent brain damage are possible. Without proper diagnosis and treatment, Reye's syndrome can be fatal within a few days.
Use caution when giving aspirin to children or teenagers. Though aspirin is approved for use in children older than age 3, children and teenagers recovering from chickenpox or flu-like symptoms should never take aspirin. This includes plain aspirin and medications that contain aspirin.
Some hospitals and medical facilities conduct newborn screenings for fatty acid oxidation disorders to determine which children are at greater risk of developing Reye's syndrome. Children with known fatty acid oxidation disorders should not take aspirin or aspirin-containing products.
Always check the label before you give your child medication, including over-the-counter products and alternative or herbal remedies. Aspirin can show up in some unexpected places, such as Alka-Seltzer.
Sometimes aspirin goes by other names, too, such as:
For the treatment of fever or pain related to the flu, chickenpox or another viral illness, consider giving your child infants' or children's over-the-counter fever and pain medications such as acetaminophen (Tylenol, others) or ibuprofen (Advil, Motrin, others) as a safer alternative to aspirin.
There's one caveat to the aspirin rule, however. Children and teenagers who have certain chronic diseases, such as Kawasaki disease, may need long-term treatment with drugs that contain aspirin.
If your child needs aspirin therapy, make sure his or her vaccines are current — including two doses of the varicella (chickenpox) vaccine and a yearly flu vaccine. Avoiding these two viral illnesses can help prevent Reye's syndrome.
There's no specific test for Reye's syndrome. Instead, screening for Reye's syndrome usually begins with blood and urine tests as well as testing for fatty acid oxidation disorders and other metabolic disorders.
Sometimes more-invasive diagnostic tests are needed to evaluate other possible causes of liver problems and investigate any neurological abnormalities. For example:
Spinal tap (lumbar puncture). A spinal tap can help the doctor identify or rule out other diseases with similar signs and symptoms, such as infection of the lining that surrounds the brain and spinal cord (meningitis) or inflammation or infection of the brain (encephalitis).
During a spinal tap, a needle is inserted through the lower back into a space below the end of the spinal cord. A small sample of cerebrospinal fluid is removed and sent to a lab for analysis.
Liver biopsy. A liver biopsy can help the doctor identify or rule out other conditions that may be affecting the liver.
During a liver biopsy, a needle is inserted through the skin on the upper right side of the abdomen and into the liver. A small sample of liver tissue is removed and sent to a lab for analysis.
Computerized tomography (CT) scan or magnetic resonance imaging (MRI). A head CT or MRI scan can help the doctor identify or rule out other causes of behavior changes or decreased alertness.
A CT scan uses a sophisticated imaging machine linked to a computer to produce detailed images of the brain. An MRI scan uses a strong magnetic field and radio waves rather than X-rays to generate images of the brain.
Skin biopsy. Testing for fatty acid oxidation disorders or metabolic disorders may require a skin biopsy, although direct gene sequencing together with blood and urine tests are often sufficient to make such a diagnosis.
During a skin biopsy, a doctor takes a small skin sample for analysis in a lab. A biopsy can usually be done in a doctor's office using a local anesthetic.
Reye's syndrome is usually treated in the hospital. Severe cases may be treated in the intensive care unit. The hospital staff will closely monitor your child's blood pressure and other vital signs. Specific treatment may include:
If your child has trouble breathing, he or she may need assistance from a breathing machine (ventilator).
Reye's syndrome is often diagnosed in an emergency situation because of serious signs and symptoms, such as seizures or loss of consciousness. In some cases, early signs and symptoms prompt a doctor's appointment.
You'll likely be referred to a doctor who specializes in conditions of the brain and nervous system (neurologist).
Because appointments can be brief and there's often a lot of ground to cover, it can help to be well prepared. Here are some tips to help you get ready for your appointment.
List your questions from most important to least important in case your time with your doctor runs out. For Reye's syndrome some basic questions to ask your doctor include:
In addition to the questions that you've prepared to ask your doctor, don't hesitate to ask questions during your appointment.
The neurologist is likely to ask about your child's symptoms and history of viral illnesses. The doctor will also conduct a medical exam and schedule tests to gather information about your child's condition and to rule out other diseases, such as meningitis or encephalitis.
December 18th, 2020
