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[Benign myoclonus of early infancy: a case report]
1Department of Pediatrics, Fukuyama National Hospital, Fukuyama, Hiroshima.
Insights
Benign myoclonus of early infancy (BMEI) presents as infant spasms that resolve spontaneously. Differentiating BMEI from epilepsy is crucial to avoid unnecessary medication.
Area of Science:
- Pediatric Neurology
- Neonatal Medicine
- Developmental Pediatrics
Background:
- Benign myoclonus of early infancy (BMEI) is characterized by infantile spasms.
- Distinguishing BMEI from epileptic seizures is clinically significant.
Observation:
- A male infant presented with spasms at 6 months, occurring only during wakefulness.
- Neurological examinations and electroencephalograms (EEG) were normal.
- Spasms resolved spontaneously within three months without intervention.
Findings:
- The infant exhibited normal psychomotor development up to 2 years of age.
- Normal EEG findings persisted, with no epileptic discharges.
- BMEI spasms are a benign, non-epileptic phenomenon that resolves spontaneously.
Implications:
- Accurate differentiation of BMEI from epileptic syndromes like West syndrome is essential.
- Avoidance of unnecessary antiepileptic drug treatment is a key clinical implication.
- Understanding BMEI's benign nature supports conservative management strategies.
Abstract:
The author reports a male infant with benign myoclonus of early infancy (BMEI). Series of spasms were first seen at the age of 6 months, then occurred from once to three times a day while he was awake, but never during sleep. The first examination at the age of 8 months revealed a normally developed infant with no neurological abnormality. Both interictal- and ictal-electroencephalograms (EEG) were normal. During three months of follow-up observation with no medication, the spasms completely disappeared. He was subsequently observed up to 2 years and 0 month of age and showed normal psychomotor development, normal EEG with no epileptic discharges, and absence of any types of seizures. The spasms associated with BMEI have been considered to be a non-epileptic phenomenon. They are benign and disappear spontaneously without any complication. Therefore, it is important to differentiate BMEI from various epileptic syndromes, especially West syndrome, to avoid unnecessary administration of antiepileptic drugs.