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[Creutzfeldt-Jakob disease: value of MRI]
H Urbach1, S Paus, H J Tschampa
1Radiologische Klinik, Rheinische Friedrich-Wilhelms-Universität Bonn. urbach@uni-bonn.de
Purpose:
To define the role of MRI in the diagnosis of Creutzfeldt-Jakob disease (CJD).
Methods:
14 patients with suspected CJD were studied within 3 years. MRI findings were correlated with WHO established diagnostic criteria (clinical findings, EEG, CSF with 14-3-3 protein assay).
Results:
12 patients had CJD. One patient each suffered from Hashimoto's encephalitis and ALS dementia complex, respectively. Nine of 12 CJD patients had increased signal intensity of the striatum (n = 8), pulvinar thalami (n = 5) and/or cerebellar and cerebral cortex (n = 3), respectively. Signal intensity was most pronounced on FLAIR sequences; six patients were studied with diffusion-weighted MRI and showed impaired diffusion in these areas. Both patients without CJD did not show the abovementioned signal changes (sensitivity 75%, specificity and positive predictive value 100%, respectively).
Conclusion:
If patients with suspected CJD are studied with FLAIR and diffusion-weighted sequences, this disorder can reliably be proven or ruled out. Typical MRI findings narrow down the differential diagnosis and should be included in the WHO diagnostic criteria.
Insights
Magnetic resonance imaging (MRI) reliably diagnoses Creutzfeldt-Jakob disease (CJD). FLAIR and diffusion-weighted MRI sequences show characteristic brain signal changes, aiding diagnosis and ruling out CJD.
Area of Science:
- Neurology
- Radiology
- Neuroimaging
Context:
- Creutzfeldt-Jakob disease (CJD) is a rare, fatal neurodegenerative disorder.
- Accurate and timely diagnosis is crucial for patient management and research.
- Magnetic resonance imaging (MRI) is a key diagnostic tool in suspected CJD cases.
Purpose:
- To evaluate the diagnostic role of MRI, specifically FLAIR and diffusion-weighted sequences, in identifying Creutzfeldt-Jakob disease (CJD).
- To correlate MRI findings with established World Health Organization (WHO) diagnostic criteria for CJD.
Summary:
- MRI demonstrated high sensitivity (75%) and specificity (100%) in diagnosing CJD among 14 suspected patients.
- Characteristic findings included increased signal intensity in the striatum, thalamus, and cortex on FLAIR sequences.
- Diffusion-weighted MRI revealed restricted diffusion in these affected brain regions, confirming CJD presence.
Impact:
- MRI, particularly with FLAIR and diffusion-weighted sequences, can reliably confirm or exclude CJD.
- Typical MRI findings aid in differential diagnosis and should be integrated into WHO diagnostic criteria for CJD.
- This enhances diagnostic accuracy and facilitates earlier identification of CJD cases.