Landau-Kleffner syndrome is a rare childhood neurological disorder characterized by the development of acquired aphasia or epileptic aphasia in combination with epileptic activity. The key pathogenetic mechanism is considered to be the presence of specific electrical discharges in the temporal lobes of the brain during sleep, which leads to a progressive loss of the ability to understand and reproduce speech. The disease usually manifests itself between 3 and 7 years of age, when the child has already mastered basic speech communication skills.
History of the disease and interesting historical facts
The disease was first described in 1957 by American neurologists William Landau and Frank Kleffner. In their pioneering work, the researchers presented clinical cases of six children with sudden loss of speech skills. “This condition cannot be considered a simple form of epilepsy, since it affects higher cortical functions,” the authors noted in the original publication. Interestingly, the first descriptions of such cases can be found in the works of French neurologists in the 19th century, but systematic study began after the publication of Landau and Kleffner.
Epidemiology (statistics of disease occurrence)
According to modern epidemiological data, the incidence of Landau-Kleffner syndrome is approximately 0.2 cases per 100,000 children per year. The average age of manifestation is 5-6 years, with boys being slightly more likely to get sick than girls with a ratio of 1.5:1. According to a 2020 meta-analysis, this syndrome accounts for about 1.2% in the structure of all forms of childhood epilepsy. The highest incidence rates are observed in Scandinavian countries.
Genetic predisposition to the disease (involved genes and mutations)
Although the exact genetic mechanisms remain poorly understood, studies have found links to polymorphisms in several genes:
- GRIN2A - encodes the NMDA receptor subunit GluN2A
- RELN - participates in the processes of neural migration
- SRPX2 - Associated with the Regulation of Synaptic Plasticity
“We found a significant correlation between mutations in the GRIN2A gene and the severity of the syndrome,” the authors of the 2018 study stated.
Risk factors for the development of this disease
Major risk factors include:
- Perinatal complications
- Traumatic brain injuries
- Cerebral infections
- Toxic effects on the central nervous system
- Hereditary burden of epilepsy
Combined effects are especially dangerous during critical periods of central nervous system development.
Diagnosis of this disease
The main diagnostic criteria are presented in the table:
| Diagnostic method | Characteristic signs |
|——————-|———————-|
| EEG monitoring | Bilateral temporal discharges during sleep |
| Neuroimaging | No structural changes |
| Speech diagnostics | Receptive aphasia |
Differential diagnosis is carried out with other forms of epileptic encephalopathy.
Treatment
The therapeutic strategy includes a comprehensive approach:
- Pharmacotherapy with anticonvulsants
- Speech therapy correction
- If necessary, surgical intervention
- Cognitive behavioral therapy
List of drugs used to treat this disease
- Sodium valproate
- Levetiracetam
- Carbamazepine
- Clonazepam
- Topiramate
Disease monitoring
Regular monitoring includes:
- EEG monitoring every 3 months
- Assessment of speech development
- Monitoring side effects of therapy
The prognosis depends on the timeliness of treatment and can vary from complete recovery to persistent speech disorders.
Age-related features of the disease
Characteristic features of the flow:
- Preschool age is the most common period of manifestation
- Primary school age - stabilization of the condition
- Adolescence - spontaneous remission is possible
Questions and Answers
- How early can you suspect Landau-Kleffner syndrome? The first signs usually appear between 3-5 years of age, but initial symptoms may be subtle.
- Is it possible to completely cure this disease? With timely diagnosis and adequate therapy, the prognosis is favorable in 60-70% cases.
- How often should an EEG be done? It is recommended to carry out monitoring every 3 months during the active phase.
Advice from Dr. Oleg Korzhikov
Parents often ask how to distinguish between normal speech problems and Landau-Kleffner syndrome:
- "Note the sudden development of speech problems"
- "Don't ignore nighttime awakenings with crying - this may be a sign of epileptic activity"
- "At the slightest suspicion, immediately contact a neurologist"
“Early diagnosis is the key to successful treatment,” emphasizes Dr. Korzhikov.
