Benign nocturnal alternating hemiplegia of childhood: Two cases with positive evolution

Benign nocturnal alternating hemiplegia (BNAH) of childhood is distinct from the classic form of malignant alternating hemiplegia of childhood 1]. It is characterized by hemiplegic attacks occurring exclusively during sleep 2]. It can be misdiagnosed as migraine, nocturnal frontal lobe epilepsy, benign rolandic epilepsy, Panayiotopoulos syndrome, or sleep-related movement disorder 1], 2], 3] and 4]. Only nine patients have been described to date, with typically, a normal development 1], 5], 6] and 7]. In order to insist about the benignity of the affection, we report two cases: a new three-year-old boy suffering from BNAH and a patient already published to show positive evolution at fourteen years of age. BNAH is a rare disorder but may be underdiagnosed. Making an early diagnosis can help to describe to the parents the good prognosis without treatment.