Parasagittal Hemispherotomy in hemispheric Polymicrogyria with electrical status epilepticus during slow sleep: Indications, Results and Follow-up

Polymicrogyria is one of the most frequently occurring brain malformation and is characterized by an excessive number of small gyri associated with lamination abnormalities (either a four layer lamination or a dyslamination). PMG is a heterogeneous malformation with variable localizations within the brain. An overview of all the topographic types of PMG shows that unilateral hemispheric PMGs are rare (2/328) [1].