Benign partial infantile seizures

Benign partial infantile seizures, also known as benign infantile epilepsy or benign infantile seizures, is a self-limited epilepsy syndrome that begins in infancy, typically between 3 and 20 months of age, with a peak onset around 5 to 6 months. This condition is characterized by recurrent focal (partial) seizures that may occur in clusters over one to several days. During seizures, infants may exhibit motor arrest, decreased responsiveness, staring, head and eye deviation, and limb jerking or stiffening, often with secondary generalization. Between seizure episodes, affected infants show normal neurological development and normal interictal electroencephalogram (EEG) findings. Brain imaging (MRI) is also typically normal. Benign partial infantile seizures can occur in both familial and sporadic forms. The familial form, sometimes referred to as benign familial infantile epilepsy (BFIE), follows an autosomal dominant inheritance pattern and has been linked to mutations in the PRRT2 gene (chromosome 16p11.2) in many families, as well as to other loci including SCN2A. The sporadic (non-familial) form presents with identical clinical features but without a clear family history of infantile seizures. The prognosis is excellent. Seizures typically respond well to antiseizure medications such as carbamazepine or valproate, and in many cases, treatment can be successfully discontinued after a period of seizure freedom. Seizures generally remit spontaneously by 2 to 3 years of age, and long-term neurodevelopmental outcomes are normal. This condition is important to distinguish from other more severe infantile epilepsy syndromes, as its benign course carries significant implications for counseling and management.

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