A 42-year-old healthy woman presented with diarrhea and diplopia two days prior to admission.
Lateral straight paresis and exhaled TOR were investigated.
Electromyography showed demyelinating polyneuropathy in the facial area, without CSF dissection and positive anti-GQ1b antibodies in serum.
Abolition of ORT and ataxia.
The diagnosis of MFS was established.
She received IVIG in usual doses.
At 6 months she had minimal paresis of the right lateral rectus.
