A case of a solitary form of Castleman disease: ten-year follow-up.

Castleman disease (CD) is a rare atypical lymphoproliferative process of obscure pathogenesis. An intracranial localization of the condition is extremely rare. We present a case of a 29-year-old man, who harbored an intracranial plasma cell variant of CD in the form of a tumor mimicking meningioma and was followed up to 10 years after surgical excision of the lesion. The histopathological examination showed massive infiltration of mononuclear cells, composed mainly of lymphocytes and matured plasmocytes, as well as many small thin-walled vessels surrounded with plasma cells and lymphocytes. This picture was consistent with a plasma cell type of CD. Ten-year follow-up supports a notion that total surgical excision of the solitary intracranial infiltration is curative in plasma cell type of CD.