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Updated: Aug 10, 2026
Isolation and Flow Cytometric Analysis of Glioma-infiltrating Peripheral Blood Mononuclear Cells
Published on: November 28, 2015
Primary CNS lymphoma
Tracy Batchelor1, Jay S Loeffler
1Stephen E. and Catherine Pappas Center for Neuro-Oncology, Massachusetts General Hospital, Boston, MA 02114, USA. tbatchelor@partners.org
Insights
Primary CNS lymphoma (PCNSL) management requires neurosurgical consultation and biopsy. Chemotherapy with or without radiation improves outcomes, but chemotherapy alone may reduce neurotoxicity risks.
Area of Science:
- Neuro-oncology
- Hematology
- Oncology
Background:
- Primary CNS lymphoma (PCNSL) is a rare non-Hodgkin's lymphoma (NHL) affecting the brain, spinal cord, or eyes.
- PCNSL incidence has risen, impacting both immunocompromised and immunocompetent individuals.
- Management differs from other extranodal NHLs, presenting unique diagnostic and therapeutic challenges.
Purpose of the Study:
- To outline diagnostic and therapeutic strategies for primary CNS lymphoma (PCNSL) in immunocompetent patients.
- To review the role of neuroimaging, biopsy, and systemic staging in PCNSL diagnosis.
- To evaluate treatment modalities including surgery, radiation, and chemotherapy for PCNSL.
Main Methods:
- Characteristic imaging features suggestive of PCNSL.
- Neurosurgical consultation for stereotactic biopsy.
- Assessment of brain, cerebrospinal fluid (CSF), and eyes for disease involvement.
- Screening for occult systemic disease.
- Evaluation of treatment outcomes for surgery, whole-brain radiation therapy (WBRT), and chemotherapy.
Main Results:
- Surgical resection offers no therapeutic benefit, reserved only for herniation.
- WBRT alone is insufficient for durable control and carries high neurotoxicity risk in older adults.
- Combined chemotherapy and WBRT improve response rates and survival compared to WBRT alone.
- Methotrexate-based chemotherapy without WBRT shows comparable efficacy and potentially lower neurotoxicity.
Conclusions:
- Early diagnosis and neurosurgical consultation are crucial for PCNSL management.
- Chemotherapy, particularly methotrexate-based regimens, is a cornerstone of treatment, with or without WBRT.
- Balancing efficacy and neurotoxicity is key, favoring chemotherapy-alone approaches in select cases to preserve quality of life.
Abstract:
Primary CNS lymphoma (PCNSL), an uncommon form of extranodal non-Hodgkin's lymphoma (NHL), has increased in incidence during the last three decades and occurs in both immunocompromised and immunocompetent hosts. PCNSL in immunocompetent patients is associated with unique diagnostic, prognostic, and therapeutic issues, and the management of this malignancy is different from that of other forms of extranodal NHL. Characteristic imaging features should be suggestive of the diagnosis, avoidance of corticosteroids, if possible, and early neurosurgical consultation for stereotactic biopsy. Because PCNSL may involve the brain, CSF, and eyes, diagnostic evaluation should include assessment of all of these regions as well as screening for possible occult systemic disease. Resection provides no therapeutic benefit and should be reserved for the rare patient with neurologic deterioration due to brain herniation. Whole-brain radiation therapy (WBRT) alone is insufficient for durable tumor control and is associated with a high risk of neurotoxicity in patients older than age 60. Neurotoxicity typically is associated with significant cognitive, motor, and autonomic dysfunction, and has a negative impact on quality of life. Chemotherapy and WBRT together improve tumor response rates and survival compared with WBRT alone. Methotrexate-based multiagent chemotherapy without WBRT is associated with similar tumor response rates and survival compared with regimens that include WBRT, although controlled trials have not been performed. The risk of neurotoxicity is lower in patients treated with chemotherapy alone.
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