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A new CT pattern in adrenoleukodystrophy

G Di Chiro, R M Eiben, H J Manz

    Radiology
    |December 1, 1980
    PubMed
    Summary
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    A novel CT imaging pattern, termed Type II, has been identified in adrenoleukodystrophy (ALD). This specific pattern involves white matter enhancement after contrast, potentially indicating a unique ALD variant.

    Area of Science:

    • Neuroradiology
    • Neurodegenerative Diseases
    • Medical Imaging

    Background:

    • Adrenoleukodystrophy (ALD) is a rare genetic disorder affecting the adrenal glands and white matter of the brain.
    • Accurate CT imaging is crucial for diagnosing and understanding the progression of ALD.
    • Previous CT descriptions of ALD have focused on specific patterns of demyelination.

    Observation:

    • A distinct CT pattern, designated Type II, was observed in two patients diagnosed with ALD.
    • This pattern is characterized by the absence of posterior periventricular hypodensity around the trigone on non-contrast CT scans.
    • A key feature is the striking enhancement of various white matter tracts after contrast administration.

    Findings:

    • Type II ALD exhibits unique contrast enhancement in white matter structures, including internal capsules, corpus callosum, corona radiata, forceps major, and cerebral peduncles.

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  • This observed pattern differs significantly from previously documented CT findings in ALD.
  • The Type II pattern has not been reported in other leukoencephalopathies, suggesting high specificity.

    • Implications:

    • The identification of Type II ALD suggests a potential phenotypic variant or an evolving stage of the disease.
    • This distinct imaging signature may aid in earlier and more accurate diagnosis of specific ALD subtypes.
    • Further research is warranted to elucidate the clinical significance and long-term implications of this newly identified CT pattern in ALD.