Monarch Disease Ontology id MONDO_0017385 (malignant migrating partial seizures of infancy) is a very rare severe form of epilepsy with poor prognosis that usually begins within a few weeks of birth. The seizure activity can appear in multiple locations in the brain or migrate from one region to another during an episode. It results in severe developmental delay. Also known as: MMPEI, MMPSI, MPEI, malignant migrating Partial seizures in infancy, malignant migrating partial epilepsy of infancy, migrating Partial seizures in infancy, migrating partial epilepsy of infancy, migrating partial seizures of infancy.