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Amyloidoma can occur within the brain parenchyma. Periventricular amyloidomas developed in a man aged 69 years as gadolinium-enhancing lesions on magnetic re sonance imaging. The lesions were composed of amyloid AL λ with congophilia resistant to potassium permanganate. There was no evidence of systemic amyloidosis or an underlying inflammatory or neoplastic disorder.
There are no evidence of systemic amyloidosis or an underlying inflammatory or neoplastic disorder.