QuestionSBA
QuestionChoice
A turbid appearance would indicate infection.
10026562
c
Turbid appearance
QuestionChoice
Although white cell count may be elevated in MS up to seven times the normal limit, a level over >100/µL would indicate a bacterial central nervous system infection.
10026561
b
Elevated neutrophil count, >100/µL
QuestionChoice
An elevated protein level in the absence of leukocytosis is more suggestive of Guillain‐Barré syndrome, rather than MS.
10026564
e
Elevated protein level
QuestionChoice
IgG oligoclonal bands (OCBs) are present in the cerebrospinal fluid (CSF) of more than 95% of patients with multiple sclerosis (MS), and are considered to be the immunological hallmark of disease.
10026560
a
Oligoclonal bands
QuestionChoice
Although white cell count may be elevated in MS up to seven times the normal limit, a level over >100/µL would indicate a viral central nervous system infection.
10026563
d
Elevated lymphocyte count, >100/µL
Concept
Chapter
2693
3745
Multiple Sclerosis
Topic
141
Neurology
17710
A 29-year-old man has been admitted to the neurology ward with lower limb weakness. He has an ataxic gait. His past medical history includes a single episode of optic neuritis. The neurologist would like to perform a lumbar puncture to look for evidence of multiple sclerosis.

What is the characteristic sign of multiple sclerosis on a lumbar puncture?
a