This condition occurs when the immune system mistakenly targets neurons in the brain, causing inflammation (encephalitis).
Children’s Health sees more children with this type of encephalitis than almost any other medical center in the region. We have the expertise to diagnose your child as quickly as possible and deliver treatments that give them the best opportunity for a good outcome.
In this form of encephalitis, the body makes antibodies that bind to proteins on the NMDA receptor. NMDA receptors are located on the outer surfaces of cells called neurons and are important to brain function.
This misdirected immune response causes inflammation and swelling in the brain (encephalitis). The NMDA receptors help neurons communicate. An immune response directed at these receptors can affect thinking, memory, mood, consciousness and breathing. These symptoms can be very serious and get worse over time.
This form of encephalitis affects about one in 1.5 million people. It affects females and males but is more common in females.
Symptoms can depend on factors such as a child’s age and which parts of the nervous system are affected. Your child may experience:
At first, a child may experience milder symptoms, including a fever and subtle changes to mood or thinking. Later, they may develop more severe symptoms such as seizures and lethargy and need to be hospitalized.
The diagnosis for this encephalitis is confirmed by a blood or spinal-fluid test, or both. These tests can detect the antibodies that attack the NMDA receptors. It can take several weeks for doctors to receive your child’s test results.
Starting treatment early makes a big difference in how a child recovers from this disease. While we wait for the test results, we will try to rule out other conditions, such as infections, metabolic diseases, psychiatric disorders and other inflammation in the brain. We will also use other tools to try and diagnose your child so we can start treating them as soon as possible. Our diagnostic approaches could include:
This type of encephalitis was identified fairly recently, and doctors still aren’t completely sure what causes it. There likely are a variety of genetic and environmental triggers. Doctors and researchers are working hard to understand what they might be. In some cases, an infection or a tumor can set off an immune response that mistakenly attacks the NMDA receptors.
We see children with this type of encephalitis every year, giving us the experience to recognize and treat this condition. We will use different therapies to suppress the immune system and limit the damage that encephalitis can cause.
In the beginning, therapies usually include:
For children who do not respond to the initial treatment or need longer-term treatment, therapies include:
This encephalitis causes a wide range of symptoms that need different kinds of treatment. Children’s Health offers expert care from specialists who work together to treat your child, including neurologists, psychiatrists, neuropsychologists, rehabilitation physicians, and physical, occupational and speech therapists.
The course of this encephalitis depends a great deal on how soon it is diagnosed and treated. Recovery can be a long journey and may take a year or two. Some children continue to have symptoms related to attention, memory and mood.
About 80% of patients recover partially or fully with early treatment. In a small number of patients, the encephalitis can return. Our clinic is on the lookout for early symptoms of relapse and treats the disease aggressively when needed.