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Cystlike white matter lesions in tuberous sclerosis
P Van Tassel1, J K Curé, K R Holden
1Department of Radiology, Medical University of South Carolina, Charleston 29425, USA.
Purpose:
To investigate the presence of small cystlike structures in the cerebral hemispheric white matter on MR images of patients with tuberous sclerosis.
Methods:
The MR images of 18 consecutive patients with tuberous sclerosis were reviewed retrospectively.
Results:
Eight of the 18 patients were found to have cystlike structures in the cerebral white matter. The signal intensity of these lesions was isointense with cerebrospinal fluid on T1-, proton density-, and T2-weighted images. Four patients were imaged with a fluid-attenuated inversion recovery sequence, which in each case also showed fluid-type signal in these areas. Three of the patients had CT for correlation, and these scans supported the diagnosis of cystic lesions. Cysts ranged in number from one to 12 per patient and were usually smaller than 1 cm. The most common location was adjacent to the occipital horn or trigone of the lateral ventricle (six of eight patients). Less frequent sites were near the frontal horns, in the corpus callosum, and in the deep white matter near the body of the lateral ventricle. Cysts in five patients were either immediately adjacent to a cortical tuber or in the center of a white matter dysplastic lesion. A cyst in one patient had septa, and none of the cysts enhanced.
Conclusions:
Cystlike structures in the cerebral hemispheric white matter were seen on the MR images of 44% of 18 patients with tuberous sclerosis. Whether these findings represent cystic degeneration of dysplastic tissue or are unrelated to the disease process of tuberous sclerosis is unknown. More than one pathogenesis may exist.
Insights
Cystlike structures were found in the brain
Area of Science:
- Neuroradiology
- Neuroscience
- Medical Imaging
Background:
- Tuberous sclerosis is a genetic disorder causing tumors in various organs.
- Cerebral abnormalities are common in tuberous sclerosis, impacting neurological function.
Purpose of the Study:
- To identify and characterize small cystlike structures in the cerebral white matter of patients with tuberous sclerosis using MRI.
- To determine the prevalence and imaging features of these lesions.
Main Methods:
- Retrospective review of MRI scans from 18 patients diagnosed with tuberous sclerosis.
- Analysis of lesion signal intensity on T1-, proton density-, T2-weighted, and fluid-attenuated inversion recovery (FLAIR) sequences.
- Correlation with CT scans in a subset of patients.
Main Results:
- Cystlike structures were identified in 8 of 18 patients (44%).
- Lesions exhibited signal intensity consistent with cerebrospinal fluid on multiple MRI sequences.
- Common locations included periventricular white matter, often adjacent to cortical tubers or white matter dysplasia.
Conclusions:
- The study identified a significant prevalence of cystlike structures in the cerebral white matter of tuberous sclerosis patients.
- The pathogenesis of these lesions remains uncertain, possibly representing cystic degeneration of dysplastic tissue or unrelated findings.
- Multiple underlying mechanisms may contribute to lesion formation in tuberous sclerosis.