A Comparison of the Fine Structure of Malignant Lymphoma and Other Neoplasms in the Brain

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Abstract
The fine structure of a primary intracranial lymphoma was examined and compared with that of a group of central nervous system tumors comprised of medulloblastoma, oligodendroglioma, ependymoma and ependymoblastoma. The principal difference was the absence of any junctional devices on the principal tumor cells of the lymphoma and their presence in the other tumors. It is suggested that this difference reflects the difference in origin of these tumors.