Clinical and laboratory findings
| Patient no. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Age, y/sex | 53/M | 59/M | 35/M | 51/M | 54/F | 41/F | 48/F | 39/M | 57/M | 23/M | 53/F | 30/M | 45/F | 49/M | 36/F |
| Diagnosis | FS | FS | FS | FS | FS | FS | FS | FS | FS | FS | FS/GBS | BBE/GBS | BBE/GBS | AO | AO |
| Antecedent illness | URTI | URTI | − | URTI | URTI | − | URTI | URTI | URTI | URTI | URTI | URTI | URTI | URTI | URTI |
| Ophthalmoplegia | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
| Ataxia | + | + | + | + | + | + | + | + | + | + | + | + | + | − | − |
| Areflexia or hyporeflexia | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
| Facial weakness | − | − | − | + | − | − | − | − | − | + | − | + | − | − | − |
| Bulbar weakness | − | − | − | − | + | − | − | − | − | + | + | + | + | − | − |
| Respiratory support | − | − | − | − | − | − | − | − | − | − | + | + | + | − | − |
| Limb weakness | − | − | − | − | − | − | − | − | − | − | + | + | + | − | − |
| Sensory abnormalities | − | − | − | Numbness of fingers | Paraesthesia and loss of fine touch upper and lower limbs | − | Paraesthesia and loss of fine touch upper and lower limbs | − | Paraesthesia and loss of fine touch hands | Paraesthesia and loss of fine touch upper and lower limbs | Decreased pain sensation upper limb | Paraesthesia and loss of fine touch upper and lower limbs | − | − | − |
| Disturbed consciousness | − | − | − | − | − | − | − | − | − | − | − | Confusion, drowsiness | Coma | − | − |
| CSF cells (/μl)/protein (g/dl) | 1/0.36 | 1/0.40 | 0/0.26 | 0/0.75 | 1/0.60 | 2/0.35 | 1/0.20 (RBC 10/μl) | 3/0.38 | 2/0.41 (RBC 20/μl) | Not done | 2/0.31; 4/0.68 | 7/0.50 (RBC 88/μl) | 54/0.27 | 0/0.89 | 5/0.50 (RBC 2585/μl) |
| IgG anti-GQ1b antibody | + | + | + | − | + | + | + | + | + | + | Not tested | + | + | + | + |
AO, acute ophthalmoparesis; BBE/GBS, Bickerstaff brainstem encephalitis overlapping with Guillain–Barré syndrome; CSF, cerebrospinal fluid; FS, Fisher syndrome; FS/GBS, FS overlapping with Guillain–Barré syndrome; RBC, red blood cell; URTI, upper respiratory tract infection.