Neuropathy Inflammatory and Immune-Mediated Neuropathy 2

Question 1

What is the most common identifiable infectious trigger for Guillain-Barré Syndrome?

Accepted Answer

Campylobacter jejuni

Answer

Campylobacter jejuni gastroenteritis is the most frequently identified precipitant of GBS, accounting for approximately 30% of cases through molecular mimicry.

Question 2

Which nerve conduction study pattern is most characteristic of CIDP?

Accepted Answer

Prolonged distal latencies, slowed conduction velocities, conduction block, and temporal dispersion

Answer

CIDP shows a diffuse demyelinating pattern on nerve conduction studies with prolonged distal latencies, markedly slowed conduction velocities, conduction block, and temporal dispersion.

Question 3

Which antibody is highly specific for Miller Fisher Syndrome, a variant of GBS?

Accepted Answer

Anti-GQ1b IgG

Answer

Anti-GQ1b IgG antibodies are present in over 90% of Miller Fisher Syndrome cases and are highly specific, targeting gangliosides concentrated at cranial nerve nodes of Ranvier.

Question 4

What is the primary mechanism by which IVIG benefits patients with inflammatory neuropathies?

Accepted Answer

Immune modulation through Fc receptor blockade, complement inhibition, and idiotype interactions

Answer

IVIG exerts multiple immunomodulatory effects including Fc receptor blockade on macrophages, complement activation inhibition, and neutralization of pathogenic antibodies.

Question 5

Which systemic connective tissue disease is most commonly associated with vasculitic neuropathy?

Accepted Answer

Rheumatoid arthritis

Answer

Rheumatoid arthritis is among the most common systemic causes of vasculitic neuropathy, along with other connective tissue diseases such as lupus and Sjögren's syndrome.

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Neuropathy Inflammatory and Immune-Mediated Neuropathy 2