Acute encephalopathy with biphasic seizures and late reduced diffusion

Acute encephalopathy with biphasic seizures and late reduced diffusion, often called AESD, is a rare brain condition that mainly affects young children, most commonly between 6 months and 4 years of age. It typically begins during a fever or viral infection, when a child suddenly develops prolonged seizures. After the initial seizures, the child may seem to improve for a few days, but then a second round of seizures occurs, usually around days 3 to 7 of the illness. During this second phase, brain MRI scans show a characteristic pattern called "reduced diffusion" in specific areas of the brain, particularly the white matter just under the cortex. This pattern helps doctors distinguish AESD from other types of childhood brain injury caused by fever or infection. The condition can lead to a range of outcomes. Some children recover well with only mild effects, while others may develop intellectual disability, epilepsy, or movement problems. The severity depends on how much brain tissue is affected. Treatment is mainly supportive, focusing on controlling seizures, reducing brain swelling, and managing the underlying infection. There is no specific cure for AESD. Researchers are studying ways to protect the brain during the critical early phase, including cooling therapy and certain medications, but no treatment has been proven to prevent the second phase of injury. Early recognition and prompt medical care are essential to give children the best chance of a good outcome.

Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.

Bring these to your next appointment

• Q1.How severe is the brain injury shown on my child's MRI, and what does this mean for their recovery?,What treatments are being used to protect my child's brain during this acute phase?,Will my child need long-term anti-seizure medication, and what are the side effects?,What developmental or learning challenges should I watch for as my child grows?,Should my child have genetic testing to look for risk factors, and would this affect treatment?,What rehabilitation services (physical therapy, speech therapy, occupational therapy) does my child need?,What should I do if my child has another seizure or develops a fever in the future?

Common questions about Acute encephalopathy with biphasic seizures and late reduced diffusion

Related conditions

Other rare diseases commonly researched alongside Acute encephalopathy with biphasic seizures and late reduced diffusion.

• Dravet syndrome→