Diagnostic criteria for GBS
| Sensory GBS1 | Typical GBS2* |
|---|---|
| *Excluding diagnosis: diagnosis of botulism, myasthenia, poliomyelitis or toxic neuropathy; abnormal porphyrin metabolism; recent diphteria; purely sensory symptoms, without weakness. †Features required for diagnosis. | |
| Acute onset of symmetric sensory loss | Progressive weakness in both arms and legs† |
| Peak deficit achieved within four weeks | Areflexia† |
| Diminished or absent reflexes | Progression of symptoms over days to four weeks |
| Normal motor strength | Relative symmetry of symptoms |
| Electrodiagnostic evidence of demyelination in at least two nerves | Mild sensory symptoms or signs |
| Monophasic course | Cranial nerve involvement |
| No other known cause for neuropathy | Recovering two to four weeks after progression ceases |
| No family history of neuropathy | Autonomic dysfunction |
| Albuminocytological dissociation in CSF | Absence of fever at onset |
| Albuminocytological dissociation in CSF | |
| Typical electrodiagnostic features | |