TK2 and epilepsy of infancy with migrating focal seizures: EIMFS is a genetically heterogeneous syndrome with at least 35 disease-causing genes identified, encoding for proteins responsible for neuronal excitability and synaptic functions6, -, 9 or associated with metabolic disorders.6,9,10 Our report suggests including the TK2 gene in the genetic screening of EIMFS-like disorders.