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Cranial magnetic resonance imaging in chronic demyelinating polyneuropathy
S H Hawke1, J M Hallinan, J G McLeod
1Department of Neurology, Royal Prince Alfred Hospital, Sydney, Australia.
Journal of Neurology, Neurosurgery, and Psychiatry
|September 1, 1990
Summary
Cranial MRI in chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) revealed white matter changes, particularly in older patients. Demyelination was rarely suggested, with age being the key predictor of MRI findings.
Area of Science:
- Neurology
- Neuroimaging
- Demyelinating Diseases
Background:
- Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) is a rare neurological disorder.
- Central nervous system (CNS) involvement in CIDP is uncommon, but white matter changes on MRI can occur.
- Understanding MRI findings in CIDP is crucial for diagnosis and management.
Purpose of the Study:
- To investigate cranial magnetic resonance imaging (MRI) findings in patients with CIDP and related neuropathies.
- To determine the prevalence and characteristics of white matter signal abnormalities in these conditions.
- To identify clinical factors associated with MRI changes.
Main Methods:
- Cranial MRI was performed on a 1.5 Tesla unit in 21 patients with CIDP and 5 with chronic demyelinating polyneuropathy and monoclonal paraproteinaemia.
- Patients with signs or symptoms of CNS disease were excluded.
- MRI results were analyzed for white matter signal intensity changes and compared with clinical data, including age and paraproteinaemia.
Main Results:
- Increased white matter signal intensity was observed in 10% of patients under 50 and 31% of those over 50.
- Only 8% of patients showed MRI findings strongly suggestive of demyelination, and these were without paraproteinaemia.
- Patient age was the only clinical variable significantly predicting MRI changes (p < 0.01).
Conclusions:
- Cranial MRI in CIDP primarily reveals non-specific white matter changes, with increasing prevalence in older individuals.
- The MRI appearance rarely suggests active demyelination in this cohort.
- Age is a significant factor influencing MRI findings in CIDP, highlighting its importance in interpreting neuroimaging results.