Subependymal grey matter heterotopia | Radiology Reference Article | Radiopaedia.org

At the time the article was last revised Arlene Campos had no financial relationships to ineligible companies to disclose. Subependymal grey matter heterotopia, also known as periventricular heterotopia, is the most common form of grey matter heterotopia and is characterized by nodules of grey matter located immediately beneath the ependyma of the lateral ventricles. It can be divided according to morphology into 2: Although the majority of cases are sporadic, some are X-linked recessive (Xq28) 3. Affected females have relatively mild cognitive deficits and tend to develop epilepsy later. Many affected males are spontaneously aborted, presumably due to cardiovascular defects. Those that survive have more profound disability 3. They most commonly are associated with epilepsy and sometimes developmental delay 2. As with other grey matter heterotopias, subependymal heterotopia is thought to result from interruption of normal neuronal migration. For further discussion please refer to

Subependymal grey matter heterotopia | Radiology Reference Article | Radiopaedia.org × About Articles Cases Courses Questions Quiz Recent Edits Supporters Log In Sign Up × ADVERTISEMENT: Radiopaedia is free thanks to our supporters and advertisers. Become a Gold Supporter and see no third-party ads. Articles Cases Courses Log In Log in Sign up {} Articles Cases Courses Quiz About Recent Edits Go ad-free Search Subependymal grey matter heterotopia Last revised by Mostafa Elfeky on 4 May 2026 Report problem with article View revision history Citation, DOI, disclosures and article dat

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