Neurological Presentation of Lead Toxicity: A Case Report

Abstract

Acute encephalopathy, caused by infectious agents, metabolic or mitochondrial dysfunction, brain tumor, or prolonged exposure to toxic elements, is a significant cause of morbidity and mortality in young children. Lead encephalopathy that occurs due to prolonged lead ingestion or exposure in children is not uncommon, and many such cases have been reported in the past. This report shares the authors’ experience of the missed diagnosis of lead encephalopathy, its red flags, and its relation to pica as a root cause. A 14-month-old boy, resident of Delhi, India, was admitted with vomiting, irritability, and two episodes of abnormal limb movements, with the first symptom starting when he was 11 months old. His case was initially treated as acute disseminated encephalomyelitis, but he showed no improvement. The child was then referred to the Sir Ganga Ram Hospital, New Delhi, India. The boy presented with severe anemia, along with basophilic stippling on the peripheral smear during routine investigations. Suspecting lead poisoning, blood lead levels were checked, and were found to be grossly elevated. The child was then started on chelation therapy. Multiple doses of chelation (dimercaprol and D-penicillamine) were given, and sequential blood lead levels were monitored, which showed a marked decrement. The child was discharged, and is being monitored routinely. Lead poisoning remains a neglected public health issue, especially in children, and delay in identification can cause significant morbidity and mortality. Pediatricians and general practitioners must be aware of this risk, especially in children with iron deficiency anemia exhibiting pica.