Different Neurologic Aspects of Nutritional B12 Deficiency in Infancy

Area of Science:

• Pediatric Neurology
• Nutritional Science

Background:

• Nutritional vitamin B12 deficiency is a preventable cause of serious health issues in infants.
• Neurologic manifestations can be severe and potentially irreversible if not addressed promptly.

Purpose of the Study:

• To evaluate the spectrum of neurologic problems associated with nutritional vitamin B12 deficiency in infants.
• To assess the outcomes of vitamin B12 treatment in affected infants.

Main Methods:

• Analysis of 24 infant cases diagnosed with nutritional vitamin B12 deficiency presenting with neurologic symptoms.
• Comparison of vitamin B12 levels between infants with isolated neurologic symptoms versus those with additional extraneurologic involvement.
• Clinical follow-up at 1 year post-treatment.

Main Results:

• Common symptoms included developmental retardation, seizures, and involuntary movements.
• Lower mean vitamin B12 levels were observed in infants with both neurologic and extraneurologic involvement.
• Most infants recovered neurodevelopmentally after vitamin B12 treatment; 3 with the lowest initial levels showed incomplete recovery.

Conclusions:

• Nutritional vitamin B12 deficiency poses a significant risk for severe, potentially lasting, neurologic impairment in infants.
• Early detection and intervention with vitamin B12 are essential to ensure optimal neurodevelopmental outcomes.
• Cyanocobalamin treatment may be associated with transient involuntary movements in severely deficient infants.