Hemifacial spasm is described in an 8-year-old boy, to my knowledge the first time the condition has been reported in childhood. The symptom resolved completely after treatment with carbamazepine.
Shaywitz BA. Hemifacial Spasm in Childhood Treated With Carbamazepine. Arch Neurol. 1974;31(1):63. doi:10.1001/archneur.1974.00490370089016
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