Concomitant multiple sclerosis and another autoimmune disease: Does the clinical course change?

Area of Science:

• Neurology
• Immunology
• Autoimmunity

Background:

• Multiple Sclerosis (MS) is a demyelinating disease involving autoimmune processes affecting myelin.
• CD4+ and CD8+ T-cells and B-cells are key players in MS pathophysiology.
• The co-occurrence of MS with other autoimmune diseases is documented, but its impact on MS clinical course is unclear.

Purpose of the Study:

• To determine the prevalence of other autoimmune diseases in patients with MS.
• To investigate if co-existing autoimmune diseases influence the clinical progression of MS.

Main Methods:

• A retrospective study of 1700 MS patients over two years at Sina Hospital MS clinic.
• Identified 24 patients with MS and a simultaneous autoimmune disease.
• Compared Expanded Disability Status Scale (EDSS) scores between patients with co-existing autoimmune diseases and a control group.

Main Results:

• The prevalence of concomitant autoimmune disease and MS was 0.014.
• Patients with co-existing autoimmune diseases had a significantly lower mean EDSS (1.62±1.12) compared to the control group (3.33±1.89) (P<0.001).
• No significant difference was observed in the mean annual relapse rate between the groups.

Conclusions:

• Co-existence of other autoimmune diseases with MS appears to modify the disease course, potentially leading to less disability.
• Further multicenter, prospective, long-term studies are warranted to validate these findings.