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Heterotopic Gray Matter

Last Updated: October 1, 2018

Figure 1: The phase sensitive (T1) inversion recovery (top row left) and FLAIR (top row right) sequences demonstrate a cluster of nodules along the ependymal surface of the posterior horn of the right lateral ventricle. They have signal characteristics matching gray matter. The T1 weighted image (bottom row) in this patient also demonstrated a band of heterotopic gray matter within the right perirolandic white matter.


  • Disrupted migration of neurons from periventricular germinal zone to the cortex