Modified Asbury Cornblath diagnostic criteria for GBS10 11
| Required features |
| Progressive motor weakness of more than one limb. |
| Areflexia or decreased reflexes in weak limbs. |
| Supportive features |
| Progressive phase lasts up to 4 weeks. |
| Recovery beginning 2–4 weeks after progression ceases. |
| Autonomic dysfunction. |
| Relative symmetry. |
| Cranial nerve involvement, especially bilateral facial nerve weakness. |
| Mild sensory symptoms or signs. |
| Pain. |
| No fever at the onset. |
| Typical features of cerebrospinal fluid and nerve conduction studies. |
| The following features make the diagnosis of GBS doubtful | Possible alternative diagnosis |
| Sensory level. | Cord compression/demyelination |
| Bowel and bladder dysfunction at onset. | Cord compression |
| Severe and persistent bowel and bladder dysfunction. | Cauda equina syndrome |
| Severe pulmonary dysfunction with little or no limb weakness at onset. | Myasthenia gravis |
| Severe sensory signs with little or no weakness at onset. | |
| Fever at onset. | |
| CSF pleocytosis with a white cell count >50/µL. | Meningitis |
CSF, cerebrospinal fluid; GBS, Guillain-Barré syndrome.