Subclinical cerebral involvement in Behcet's disease: a SPECT study

Area of Science:

• Neurology
• Immunology

Background:

• Behcet's disease (BD) can affect the central nervous system (CNS), with reported prevalence rates ranging from 4-49%.
• CNS involvement typically manifests months to years after systemic symptoms, but can be the initial presentation in 5% of cases.
• Variability in prevalence suggests potential subclinical neurologic involvement in BD patients.

Purpose of the Study:

• To investigate subclinical neurologic involvement in Behcet's disease patients without neurological symptoms.
• To explore the utility of cerebral single-photon emission computed tomography (SPECT) in detecting early-stage CNS abnormalities in BD.

Main Methods:

• 20 Behcet's disease patients without neurological symptoms underwent cerebral SPECT.
• A control group with non-neurologic conditions was included for comparison.
• Brain MRI was performed for patients with abnormal SPECT findings.

Main Results:

• Cerebral SPECT revealed decreased and asymmetrical tracer uptake in 35% of Behcet's disease patients.
• Brain MRI scans were normal in these patients, despite abnormal SPECT findings.
• Functional imaging detected abnormalities before morphological changes were evident on MRI.

Conclusions:

• Cerebral SPECT can identify subclinical neurologic involvement in Behcet's disease patients.
• SPECT may detect early-stage functional abnormalities in the CNS before structural damage occurs.
• This imaging technique is valuable for diagnosing early neurologic changes in BD, even in asymptomatic individuals.