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  • Title: Primary central nervous system lymphoma.
    Author: Bhagavathi S, Wilson JD.
    Journal: Arch Pathol Lab Med; 2008 Nov; 132(11):1830-4. PubMed ID: 18976024.
    Abstract:
    Primary central nervous system lymphoma (PCNSL) is an uncommon extranodal non-Hodgkin lymphoma. Its incidence has increased during the last 3 decades and has been reported in both immunocompromised and immunocompetent patients. Immunocompromised patients are affected at a younger age compared with immunocompetent patients. It presents with raised intracranial pressure and focal neurologic and neuropsychiatric symptoms. The lesions are typically solitary. The majority of the lesions are located in the periventricular area, whereas in a few cases they are located in the supratentorial area. Diffuse large B-cell lymphomas constitute most PCNSLs, whereas T-cell, low-grade, anaplastic, and Hodgkin lymphomas are rarely encountered. The morphology of PCNSL shows a characteristic angiocentric pattern and is positive for B-cell markers by immunohistochemistry. The differential diagnosis of PCNSL includes central nervous system gliomas, metastatic tumors, demyelinating disorders, subacute infarcts, and space-occupying lesions due to an infectious etiology. The understanding of the molecular mechanisms involved in the pathogenesis of PCNSL and the identification of molecular biomarkers have lagged behind that of systemic nodal lymphomas. Primary central nervous system lymphomas are treated with combined radiotherapies and chemotherapies. The prognosis for PCNSL is worse than for other extranodal lymphomas.
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