A recent study [38] established a role of CD34 as a diagnostic marker in glioneuronal lesions associated with epilepsy, especially in dual lesions of gangliogliomas with focal cortical dysplasia, but also indicates a possible pathogenetic relationship between focal cortical dysplasia and gangliogliomas, while suggesting a different aetiology for DNT. The gene discussed is CD34; the disease is ganglioglioma.