What particular variant of multiple sclerosis is characterized by the appearance of the disorder around 40 years of age, does not include periods where symptoms fade, and typically leads to earlier disability?

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Quizplus · Accepted Answer

Primary progressive multiple sclerosis (PPMS) is characterized by a gradual onset and steady progression of signs and symptoms without initial relapse and remission phases. It typically begins in the late 30s or early 40s and can lead to disability more rapidly than the relapsing-remitting form.

What Particular Variant of Multiple Sclerosis Is Characterized by the Appearance