Reye syndrome is currently a relatively rare disease, with an incidence of approximately one in a million cases. The most common cause is aspirin use during upper respiratory tract infections. Reye syndrome is a rare but severe condition characterized by the combination of liver dysfunction and serious neurological findings such as cerebral edema.

This syndrome usually occurs in childhood, most commonly between the ages of 4 and 12; however, it can occur in very rare cases even in adults. Studies conducted in the 1980s demonstrated that aspirin use during upper respiratory tract infections could cause Reye syndrome, and therefore, limiting aspirin use resulted in a significant decrease in the incidence of the disease.

Currently, it is an extremely rare condition, with a reported incidence of one in one million cases. Caution in aspirin use, and especially in children, under the supervision of a doctor, is an important factor in reducing the risk of Reye syndrome.

Reye syndrome symptoms

Reye syndrome is a disease that can affect various systems, but most commonly affects the brain and liver. Symptoms may include:

• Severe and recurrent vomiting: Sudden and severe vomiting that begins approximately 3-5 days after an upper respiratory tract infection is one of the symptoms of Reye syndrome.
• Changes in consciousness and behavior: Patients may experience significant changes in consciousness and behavior. This often manifests as restlessness, agitation, or irritability.
• Seizures: Reye syndrome can cause seizures in patients. These seizures are often severe and observable.
• Coma: As the disease progresses, severe states of loss of consciousness, such as coma, may occur.
• Liver symptoms: The liver is affected, with symptoms such as enlargement, fatty liver, and increased liver enzymes and ammonia levels. Jaundice is usually not observed.
• Heart and kidney failure: Reye syndrome can also affect other organ systems, such as heart and kidney failure .

Symptoms usually become apparent as the disease progresses. If your child or anyone else experiences these symptoms, seek immediate medical attention.

What causes Reye syndrome?

Although the exact cause of Reye syndrome is unknown, it is known to occur during recovery from viral infections such as the common cold, flu, or chickenpox. This syndrome typically occurs in childhood and young adulthood.

A significant risk factor for Reye syndrome is the use of aspirin and similar salicylate-containing medications. Research shows that using salicylate-containing medications following viral infections increases the risk of Reye syndrome. Therefore, it is recommended that children avoid aspirin-containing medications, especially during viral infections such as colds, flu, or chickenpox.

Reye syndrome can cause damage to cell structures called mitochondria. Mitochondria are important structures that provide energy to cells. Damage to mitochondria in the liver can negatively impact energy production, disrupting normal liver function. This can lead to the accumulation of harmful substances in the body and cerebral edema. These mechanisms constitute the fundamental pathophysiology of Reye syndrome.

How is Reye syndrome diagnosed?

The diagnosis of Reye syndrome is usually made based on a thorough medical history and clinical examination. In cases of doubt, the following methods can be used:

• Blood and urine tests: Blood and urine tests can help examine liver function, electrolyte levels, and other biochemical parameters.
• Brain CT or MRI: Brain computed tomography (CT) or magnetic resonance imaging (MRI) may be used to evaluate possible edema or other abnormalities in the brain.
• Lumbar puncture: A lumbar puncture may be performed to obtain a sample of cerebrospinal fluid. This allows for more detailed evaluation, particularly of neurological symptoms.
• Liver biopsy: Rarely, a liver biopsy may be performed to evaluate specific changes in the liver.

Diagnosing Reye syndrome generally involves ruling out other similar conditions and obtaining laboratory findings consistent with typical symptoms. The diagnosis process takes into account the child's or patient's general health and symptoms, and includes appropriate medical imaging and testing.

How is Reye syndrome treated?

There is no specific treatment for Reye syndrome. Treatment generally includes symptomatic and supportive measures. The treatment plan is individualized based on the patient's condition, the severity of symptoms, and the extent of organ system involvement. Some general approaches to treating Reye syndrome include:

• Supportive treatment: Fluid therapy, regulation of electrolyte balance and nutritional support, if necessary, are provided to support the general condition of the patient.
• Intensive care monitoring: Reye syndrome can lead to cerebral edema and other serious complications. Therefore, patients often require intensive care unit monitoring.
• Managing intracranial pressure: Increased intracranial pressure may occur as a result of cerebral edema. This may require specialized treatment and monitoring.
• Treating the underlying cause: The underlying cause of Reye syndrome is often associated with salicylate-containing medications, such as aspirin, taken during upper respiratory tract infections. Therefore, if aspirin is suspected as the cause, such medications should be discontinued immediately.

Treatment depends on early diagnosis and appropriate intervention. Therefore, any symptoms a child or patient experiences should be taken seriously and prompt medical attention should be sought.

What are the potential complications after Reye syndrome?

Possible complications of Reye syndrome may include:

• Difficulty focusing and weakened memory: Individuals may experience difficulty focusing and memory problems after Reye syndrome.
• Vision or hearing loss: This syndrome can cause vision or hearing loss.
• Speech and learning difficulties: Reye syndrome can cause speech and learning difficulties.
• Movement and posture problems: In some patients, movement and posture problems may occur after Reye syndrome.
• Difficulty swallowing: Swallowing difficulties are another potential complication of this syndrome.
• Difficulty dressing or using the toilet: Due to Reye syndrome, some patients may experience difficulties dressing or using the toilet.

These complications may occur more frequently in cases of severe Reye syndrome. However, when treatment is initiated early and the disease is mild, such complications may be less frequent and, in some cases, may disappear completely. If Reye syndrome is suspected, it is important to seek immediate medical attention.

Reye syndrome precautions: How to protect yourself and reduce the risk?

The following precautions can be taken to protect against Reye syndrome:

• Avoiding aspirin: Aspirin should be avoided, especially in children with upper respiratory tract infections. Aspirin use following viral infections associated with Reye syndrome may increase the risk of developing the syndrome.
• Vaccination: Children and adults should be vaccinated against viral infections, especially chickenpox (varicella) and influenza (flu). These vaccines can reduce the severity of illnesses and minimize the risk of Reye syndrome.
• Children diagnosed with congenital metabolic disorders : Children diagnosed with congenital metabolic disorders should avoid aspirin, particularly because it may increase the risk of Reye syndrome. In this case, it is important to consult a doctor who is skilled in treatment and medication use.
• Follow the doctor's instructions: If your child needs to use aspirin regularly, you should definitely consult a doctor and follow his recommendations.
• General health measures: In general, good general health in children and adults can reduce the risk of Reye syndrome by increasing their resistance to infection. This can be supported by regular health checkups and hygiene measures.