Olfactory alterations in patients with multiple sclerosis.

Area of Science:

• Neurology
• Olfactory Neuroscience

Background:

• Olfactory dysfunction is increasingly recognized as a potential symptom in Multiple Sclerosis (MS).
• Understanding the prevalence and correlates of olfactory impairment in MS is crucial for comprehensive patient management.

Purpose of the Study:

• To evaluate olfactory function in MS patients using the Connecticut test.
• To investigate the relationship between olfactory alterations, disease duration, and Expanded Disability Status Scale (EDSS) scores in MS.

Main Methods:

• A cohort of 100 MS patients and 100 healthy controls completed a questionnaire assessing olfactory function.
• MS patients with olfactory alterations underwent facial CT scans to rule out other causative factors.

Main Results:

• 32% of MS patients exhibited olfactory alterations, significantly higher than the 3% observed in healthy controls.
• MS patients with an EDSS score above 4 had a 5.2-fold increased risk of olfactory dysfunction.
• Individuals over 38 years old had a 2.2-fold higher risk of olfactory impairment compared to younger patients.

Conclusions:

• Olfactory alterations are common in MS patients, suggesting this assessment can be a valuable tool in monitoring disease progression.
• Further research is warranted to fully elucidate the correlations between olfactory changes and the evolution of MS.