GBS – AMAN — SCE Neurology MCQ

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ModeratePeripheral Neuropathy & NeuromuscularGBS – AMANSCE Neurology

A 55-year-old woman with GBS (AIDP) following Campylobacter has NCS showing severely reduced CMAPs with normal velocities and normal sensory studies. EMG shows widespread denervation. What GBS variant?

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Correct answer: D — AMAN

AMAN shows reduced CMAPs (motor axonal loss) with normal velocities and normal sensory studies. It is associated with Campylobacter and anti-GM1/GD1a antibodies. A: AIDP has demyelinating features. C: AMSAN involves both motor and sensory axons. D: MFS has ophthalmoplegia and ataxia. E: CIDP is chronic.

Reference: EAN/PNS GBS Guidelines (2023)