Figure 1
Gross subcortical heterotopia
Clinical History
Epilepsy
Imaging Findings
The patient had longstanding epilepsy. On MRI examination, conventional T1 and T2-weighted images were acquired.
Discussion
Common causes of temporal epilepsy include hippocampal sclerosis, nonspecific
cortical gliosis, vascular malformations, and tumors. Moreover, disorders of
neuronal migration and organization, such as focal cortical dysplasia
(polymicrogyria) and gray matter heterotopia, may be observed in this region.
The presence of heterotopic gray matter is characterized by its similar signal
pattern with the remaining normal cortex on T1-weighted, and proton-density and
T2-weighted images. Gray matter heterotopia can be subdivided into several types
including subependymal heterotopia, subcortical heterotopia, and band
heterotopia. In the current patient, heterotopic gray matter was abundant
covering a wide region in the left temporal lobe in the form of subcortical
heterotopia, extending from the lateral venticle to the cortex.
Differential Diagnosis List
Heterotopia in the left temporal lobe
Final Diagnosis
Heterotopia in the left temporal lobe
References
[1] Barkovich AJ. Pediatric neuroimaging. Lippincott Williams & Wilkins, Philadelphia (2000).
Case information
| URL: | https://www.eurorad.org/case/1013 |
| DOI: | 10.1594/EURORAD/CASE.1013 |
| ISSN: | 1563-4086 |
