Microlissencephaly

What it means

Severe microcephaly and lissencephaly with granular surfaces with immature cortical plate, reduced in thickness, with focal polymicrogyria and immature small neurons with rare processes, intermingled with a considerable number of glial elements.

This is a severe phenotype that can be diagnosed at the fetopathological level, by which a diagnosis of lissencephaly can be made by the examination of the 6 layers of the cortex. Examination may show 3 layers or an extremely thin cortical plate consistent with the diagnosis of lissencephaly.

Rare diseases that can present with this1

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Lissencephaly type III · Type 3 lissencephaly · Type III lissencephaly