Refractory epilepsy from lead poisoning

Area of Science:

• Environmental Health
• Pediatric Neurology
• Toxicology

Background:

• Lead exposure is a significant public health issue in the UK, especially affecting children.
• Lead poisoning presents with non-specific symptoms and rare neurological manifestations, complicating diagnosis and treatment.
• Vulnerable pediatric populations are at higher risk for severe outcomes from lead exposure.

Purpose of the Study:

• To report a case of acute-on-chronic lead poisoning presenting as refractory status epilepticus in a child.
• To emphasize the importance of considering lead toxicity in pediatric cases of unexplained encephalopathy or seizures.
• To illustrate the diagnostic and therapeutic approach for lead poisoning in a pediatric patient.

Main Methods:

• Case report of a 6-year-old boy with autism spectrum disorder and pica.
• Diagnostic workup included blood tests (hemoglobin, blood film), MRI, and blood lead level measurement.
• Treatment involved intravenous sodium calcium edetate, bowel irrigation, and oral chelation therapy.

Main Results:

• The patient presented with new-onset refractory status epilepticus unresponsive to standard treatment.
• Diagnostic findings included microcytic anemia, basophilic stippling, diffuse cortical changes on MRI, and markedly elevated blood lead levels.
• Treatment led to clinical improvement, seizure resolution, and a declining lead burden.

Conclusions:

• Lead toxicity should be considered in children with unexplained encephalopathy or refractory seizures.
• Early recognition and intervention are vital to prevent irreversible neurological damage.
• This case underscores the challenges and importance of managing lead poisoning in pediatric neurology.