Dysgyria

What it means

An abnormal gyral pattern characterized by abnormalities of sulcal depth or orientation.

Dysgyria translates as abnormal gyration and can therefore be applied to almost every type of MCD (malformations of cortical development). However, this term was introduced to describe cortical malformations that do not meet classic features of any of the abovementioned well-established MCD types. Dysgyria describes a cortex of variable thickness and an abnormal gyral pattern characterized by abnormalities of sulcal depth or orientation (for example, obliquely oriented sulci directed radially towards the center of the cerebrum and narrow gyri separated by abnormally deep or shallow sulci). In the vast majority of cases, the term dysgyria describes an abnormal non-lissencephaly, non-polymicrogyria cortex within the spectrum of tubulinopathies.

Rare diseases that can present with this5

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