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MRI in sporadic Creutzfeldt-Jakob disease: correlation with clinical and neuropathological data
Abstract:
To ascertain whether increased grey matter signal intensity on T2-weighted images in patients with sporadic Creutzfeldt-Jakob disease (CJD) corresponds to the stage and severity of this disease, we correlated MRI findings in four of our own and previously reported patients with sporadic CJD with the clinical variants, neuropathological changes at autopsy, duration of the disease and survival time after MRI examination. Of 15 patients with the extrapyramidal type of CJD, 10 showed increased signal in the basal ganglia on T2-weighted images. One of seven patients with the Heidenhain variant had increased signal in the occipital cortex. Patients without increased grey matter signal intensity had a longer overall duration of CJD (P = 0.035). Although the interval between onset of neurological symptoms and MRI was not different, patients without increased grey matter signal also survived longer after MRI examination (P = 0.022).
Insights
Increased grey matter signal intensity on T2-weighted MRI scans in sporadic Creutzfeldt-Jakob disease (CJD) patients correlates with disease severity. Patients lacking this MRI finding experienced longer disease duration and survival.
Area of Science:
- Neuroimaging
- Neurology
- Pathology
Background:
- Sporadic Creutzfeldt-Jakob disease (sCJD) is a fatal neurodegenerative prion disease.
- MRI, particularly T2-weighted imaging, is crucial for diagnosing sCJD.
- Grey matter signal intensity changes on MRI may reflect disease stage and severity.
Observation:
- This study analyzed MRI findings in patients with sporadic CJD.
- Correlations were made between T2-weighted MRI signal intensity and clinical variants, neuropathology, disease duration, and survival.
- Specific patterns of increased signal intensity were noted in the basal ganglia and occipital cortex in certain sCJD subtypes.
Findings:
- Increased grey matter signal intensity on T2-weighted MRI in sCJD patients was associated with more severe disease.
- Patients without increased grey matter signal intensity exhibited a longer overall duration of sCJD (P = 0.035).
- Absence of increased grey matter signal on MRI correlated with longer survival time after the examination (P = 0.022), despite similar onset-to-MRI intervals.
Implications:
- T2-weighted MRI signal intensity can serve as a prognostic biomarker in sporadic CJD.
- These findings enhance the understanding of the relationship between imaging features and disease progression in sCJD.
- Further research can refine MRI-based prognostication for prion diseases.