Govender et al. present an important overview of criteria employed to predict recurrence and progression to MS, with particular attention given to radiological findings. Guevara Campos and González Guevara focus specifically on Landau Kleffner syndrome (LKS; sometimes called infantile acquired aphasia), in which language comprehension and expression impairments emerge after an initial period of normal development. Diagnosis (and differentiation from autism and other forms of learning disability) can be difficult and contingent upon encephalography (EEG) recordings acquired during sleep. The authors reflect on the advantages of magnetoencephalography (MEG) employed on its own, or in combination with EEG, for differential diagnosis, evaluation and management
