Table 1.

Diagnostic criteria for neurosarcoidosis establish definite, probable and possible disease [6]

Definite	Clinical presentation compatible with neurosarcoidosis
	Exclusion of other possible causes
	Positive nervous system histology
Probable	Clinical presentation compatible with neurosarcoidosis
	Laboratory support of CNS inflammation*
	Exclusion of other possible causes
	Evidence of systemic sarcoidosis**
Possible	Clinical presentation compatible with neurosarcoidosis
	Exclusion of other possible causes

*High concentrations of CSF protein and high numbers of cells, the presence of oligoclonal bands, or MRI evidence compatible with neurosarcoidosis. **Positive histology or at least two indirect indicators from gallium scan, chest imaging, and serum angiotensin converting enzyme.