List of differential diagnostics investigated
| Results | |
| Serum markers | Results |
| Treponema pallidum hemagglutination assay | Negative |
| Anti-nuclear antibodies, anti-dsDNA | Negative |
| Homocystein and Vitamine B12 | Normal |
| Anti-HIV antibody | Negative |
| Tumour markers (CEA, CA 15–3, CA 125, CA 19–9, cyfra 21–1) | Negative |
| Neuronal antibodies (anti-Yo, anti-Hu, anti-Ri, anti-Amphiphysin, anti-Ma2, anti-CV2) | Negative |
| Anti-NMO (anti-aquaporin 4 antibody) | Negative |
| Anti-NMDA receptor antibody | Negative |
| Anti-VGKC antibody | Negative |
| CSF and serum markers | |
| Oligoclonal band | Negative |
| CSF markers | |
| RT-PCR panel for HSV-1, HSV-2, Influenza, VZV, HHV-6 | Negative |
| Serology for Cysticercus cellulosae, Toxocara canis, Strongyloides stercoralis, Gnathostoma spinigerum, Angiostrongylus cantonensis | Negative |
CSF, cerebrospinal fluid; RT-PCR, real-time PCR.