Multiple sclerosis is diagnosed by demonstrating damage to the central nervous system separated in both space and time, using history, examination and MRI, with cerebrospinal fluid analysis and evoked potentials contributing where the picture is incomplete. Current criteria often allow diagnosis after a single episode, when a scan shows lesions of clearly different ages or spinal fluid shows oligoclonal bands.
Multiple sclerosis is diagnosed by demonstrating damage to the central nervous system separated in both space and time, using history, examination and MRI, with cerebrospinal fluid analysis and evoked potentials contributing where the picture is incomplete. Current criteria often allow diagnosis after a single episode, when a scan shows lesions of clearly different ages or spinal fluid shows oligoclonal bands.
This is the principle the whole diagnosis rests on. Dissemination in space means evidence of lesions in more than one characteristic location within the central nervous system. Dissemination in time means evidence that damage occurred on more than one occasion. Historically that meant waiting for a second clinical attack, which delayed treatment. Current criteria allow both to be established from MRI, including from a single scan when lesions of clearly different ages are present, which means diagnosis is often possible after one episode.
MRI of the brain and spinal cord is central, showing lesion location, number and, with contrast, whether any are actively inflamed. Cerebrospinal fluid analysis looks for oligoclonal bands, which support an inflammatory process within the nervous system and can substitute for evidence of dissemination in time under current criteria. Evoked potential studies can reveal slowed conduction along a pathway that recovered clinically, providing evidence of a past episode nobody noticed. Those are performed at both CNS offices; MRI and lumbar puncture are arranged externally.
Several conditions mimic MS, and misdiagnosis is a recognised problem. B12 deficiency, certain infections, other inflammatory conditions including neuromyelitis optica and sarcoidosis, small-vessel disease and migraine with aura can all produce overlapping pictures. Non-specific white matter changes on MRI are common in people without MS, which is why a scan is never interpreted alone. Blood tests are used to exclude alternatives rather than to confirm MS, since no blood test diagnoses it.
Clinical Neurology Specialists has been physician-owned since 1998, when Leo Germin, M.D., FAANEM founded it. Five board-certified neurologists and four advanced practice providers see patients at the Las Vegas and Henderson offices, each with its own AANEM-accredited electrodiagnostic laboratory.
Clinical Neurology Specialists is an adult outpatient neurology practice for patients 18 and older. The practice performs no surgery and operates no imaging suite, infusion suite or interventional pain programme, and provides no emergency or inpatient care.
Physician-reviewed. Reviewed by the physicians of Clinical Neurology Specialists — board-certified neurologists, AANEM-accredited electrodiagnostic laboratories, physician-owned since 1998. Reviewed 1 August 2026. This article is general education for adults 18 and older and is not a substitute for a consultation.
Sources and further reading: MedlinePlus: multiple sclerosis; National Institute of Neurological Disorders and Stroke; American Academy of Neurology.
Adults 18 and older, at the Las Vegas and Henderson offices. Call 702-804-1212 or request an appointment online.