Table 1.

Supplementary examinations.

Test	Date of test	Result
MRI	1992	Normal
	2003	3 Tesla MRI normal
	2007	Slightly atrophy over the right frontoparietal region
	2012	More marked atrophy, most prominent in the right frontal lobe. Increased enhancement in different areas in the right hemisphere, some resembling edema
	2016	Increased atrophy in the right frontoparietal region
	2019-April	Considerable loss of brain substance in the right hemisphere and in mesencephalon, pons and diffuse symmetrical atrophy of cerebellum.
	2019- June	New edema with diffusion restriction in the right cortical parietooccipital region and in the right thalamus, representing ictal/ post ictal activity
	2019-Septembre	Considerable loss of brain substance in the right hemisphere and in mesencephalon, pons and cerebellum - unchanged from April 2019
Brain pathology	2012	Brain biopsy: reactive gliosis and nerve cell loss in the gray matter of the brain, slight lymphocyte infiltration. Immunostaining for B and T cells did not show any significant changes except for a few CD3 positive T-cells perivascularly. No increase in CD20 positive B-cells.
Cerebrospinal fluid	2000	Slight increase in leucocytes
	2012/ 2013/2019	Normal with regards to cell count, protein, glucose ratio. Encephalitis antibodies negative for: anti-NMDA, AMPA1, AMPA 2, Gabareceptor B1, Contactin-associated protein 2, Leucin-rich glioma- inactivated protein 1, anti-CASPR2, anti-DPPX
Blood tests	1992–2020	SR, CRP, white blood count: normal; encephalitis antibodies: Negative
EEG	2002	Epileptiform discharges were present and most prominent in the right frontal region, but also seen in in the temporal region
	2019-June	Focal status epilepticus, with some clinical seizures starting in the right occipital region
	2019-September	Slow (theta and delta) activity bilaterally, and additionally more focal slowing over the right frontotemporal region. Sharp waves were also seen in this region, but were less frequent than in July