Which are the symptoms of Febrile infection-related epilepsy syndrome - FIRES?

Febrile infection-related epilepsy syndrome (FIRES) is a rare, catastrophic form of new-onset refractory status epilepticus that typically begins in previously healthy children following a mild febrile illness. The hallmark of Febrile infection-related epilepsy syndrome (FIRES) is the rapid onset of frequent, drug-resistant seizures that do not respond to standard anti-seizure medications, often leading to a prolonged state of status epilepticus.

What are the characteristic symptoms of Febrile infection-related epilepsy syndrome (FIRES)?

The clinical progression of Febrile infection-related epilepsy syndrome (FIRES) usually follows a distinct pattern. Most patients experience a febrile illness—often a common cold or viral infection—two to 14 days before the onset of seizures. Following this, the patient enters the acute phase, characterized by:

• Frequent, daily seizures that rapidly increase in intensity and frequency.


• Development of refractory status epilepticus, where seizures last longer than 30 minutes or occur in clusters without recovery of consciousness between them.


• Cognitive regression and encephalopathy occurring concurrently with the seizure activity.

How does the clinical progression of FIRES evolve?

In Febrile infection-related epilepsy syndrome (FIRES), symptoms evolve from the initial acute, inflammatory-like seizure phase into a chronic phase. During the chronic phase, the intensity of seizures may stabilize, but they often remain highly resistant to pharmacological intervention. Many patients with Febrile infection-related epilepsy syndrome (FIRES) experience long-term cognitive impairment, motor deficits, and persistent epilepsy that significantly impacts daily quality of life.

When should you seek immediate medical attention?

Because Febrile infection-related epilepsy syndrome (FIRES) is a medical emergency, immediate emergency care is required if a child experiences a prolonged seizure or if a cluster of seizures occurs following a recent fever. With 65 members currently connected through DiseaseMaps.org, we recognize how vital early intervention is; never wait to seek specialized neurological care if seizure patterns become unmanageable or consciousness is altered.

Next steps

• Consult a pediatric neurologist or epileptologist immediately if you suspect Febrile infection-related epilepsy syndrome (FIRES).


• Request an urgent EEG and neuroimaging to differentiate this from other encephalopathies.


• Join the DiseaseMaps.org community to connect with other families navigating the challenges of this diagnosis.


• Consult with a tertiary care center specializing in rare pediatric epilepsy syndromes.

Medical disclaimer: This content is for informational purposes only and does not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD)


• Orphanet: Rare disease database


• PubMed: Clinical studies on FIRES and status epilepticus


• The Epilepsy Foundation: Information on rare epilepsy syndromes