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Updated: May 17, 2026

Modeling Multiple Sclerosis in the Two Sexes: MOG35-55-Induced Experimental Autoimmune Encephalomyelitis
Published on: October 13, 2023
Moyamoya disease can masquerade as multiple sclerosis
Leslie J Dorfman1, Nancy J Fischbein, Joslyn I Woodard
1Departments of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA. ldorfman@stanford.edu
Background:
Moyamoya disease (MM) is a rare disorder of the cerebral arterial circulation, whereas multiple sclerosis (MS) is a relatively common immune-mediated attack on central myelin. Despite the differences in pathogenesis, the 2 disorders share some clinical features which can lead to diagnostic confusion: both can affect young adults, cause intermittent neurological symptoms, and show multifocal abnormalities on brain imaging.
Objective:
To emphasize the need for early consideration of MM in the differential diagnosis of MS-spectrum disorders.
Methods:
Chart reviews and individual case analyses.
Results:
We present detailed descriptions of 3 patients with MM, and summary data on 8 additional cases, in which there was diagnostic confusion with MS, with delays in treatment ranging from 2 months to 19 years (median=4 y).
Conclusions:
MM can be misdiagnosed as MS, leading to delay in correct treatment. We highlight the clinical and radiologic features which allow differentiation of these conditions early in the course, when treatment can have maximum benefit.
Insights
Moyamoya disease (MM) can be misdiagnosed as multiple sclerosis (MS), delaying crucial treatment. Early identification of MM through distinct clinical and radiologic features is vital for timely intervention.
Area of Science:
- Neurology
- Vascular Neurology
- Neuroimmunology
Background:
- Moyamoya disease (MM) is a rare cerebrovascular disorder affecting arterial circulation.
- Multiple sclerosis (MS) is a common immune-mediated demyelinating disease.
- Both MM and MS can present with overlapping symptoms and imaging findings in young adults.
Observation:
- Diagnostic confusion between MM and MS can lead to significant treatment delays.
- Case studies reveal delays ranging from months to nearly two decades.
- This overlap necessitates careful differential diagnosis.
Findings:
- MM can mimic MS, leading to delayed diagnosis and treatment.
- Specific clinical and radiological features differentiate MM from MS.
- Prompt differentiation is key to effective management.
Implications:
- Early consideration of MM in MS differentials is crucial.
- Accurate diagnosis ensures timely and appropriate treatment for MM.
- Distinguishing MM from MS optimizes patient outcomes and treatment efficacy.
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