Radiological findings in neurosarcoidosis

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Abstract
The radiological investigation of neurosarcoidosis was discussed in relation to a series of 32 patients presenting to a neurological hospital. Cranial computed axial tomography (CAT), performed in 13 cases, was the most frequently positive procedure (77%). The indications for air studies are now limited, but in cases with nerve or chiasmal syndromes and negative CAT they may show small mass lesions, or incomplete filling of basal cisterns due to granulomatous infiltration or fibrosis. Sarcoid masses are avascular, and angiography was only useful for exclusion of incidental tumors with pathological circulation. Cord syndromes were present in 8 cases, but myelography was only indicated in 5 of these and was normal in 3. The cord may be involved by intra-medullary granulomas or meningeal infiltration causing arachnoiditis, both of which cause myelographic abnormalities although these are not specific for sarcoidosis.

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