A 34 years old man presents with acute onset of blurry vision, nausea, and vomiting. He notes symmetrical weakness in his arms and trunk. He recently returned from Alaska, where he recalls eating home-preserved fish while visiting a family friend. What are the most important differential diagnoses?

Of the relevant differential diagnoses, it is important to rule out encephalitis, myasthenia gravis and Guillain-Barre syndrome.

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This post was written by Omar Rifai