Pathologic deposition of non-amyloid immunoglobulin in the brain leading to mass effect and neurological deficits
2016
We report a 31-year-old man with multiple large, non-enhancing intracerebral lesions exerting significant mass effect. Following debulking, histopathological analysis revealed abundant amorphous non-amyloid eosinophilic material, while liquid chromatography mass spectrometry revealed κ light chains and immunoglobulin A heavy chains, leading to the diagnosis of multiple intracerebral light-and-heavy chain aggregomas. Localized intracranial deposits of non-amyloid immunoglobulin may rarely mimic space-occupying intracranial neoplasms and should be considered in the differential diagnosis.
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