Table 3.

Classification of cases as confirmed, probable, or possible association with SARS-CoV-2 infection

Patient	Diagnosis	SARS-CoV-2 CNS sample	Evidence of other commonly associated causes	Provisional case definitions for the association of COVID-19 with neurological disease [8]
1	Guillain-Barré syndrome	Negative	Negative infectious CSF PCR panel, negative C jejuni PCR	Probable
2	Guillain-Barré syndrome	Negative	Negative infectious CSF PCR panel	Possible
3	Guillain-Barré syndrome	Negative	Negative infectious CSF PCR panel	Possible
4	Bilateral optic neuritis, left VI cranial nerve paresis	Negative	Negative infectious CSF PCR panel	Probable
5	Left optic neuritis	Negative	Negative infectious CSF PCR panel	Probable
6	Anti NMDA encephalitis	Positive	Negative infectious CSF PCR panel	Confirmed encephalitis
7	Ischemic stroke	Not performed	Aortic coarctation	Possible
8	Ischemic stroke	Not performed	Acute myeloid leukemia	Possible
9	Myositis	Not performed	Negative respiratory panel	Probable
10	Para infectious ataxia	Negative	Negative infectious CSF PCR panel	Probable