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Central neurocytoma: proliferative potential and biological behavior
1Department of Neurosurgery, Seoul National University College of Medicine, Korea.
Journal of Neurosurgery
|May 1, 1996
Summary
Central neurocytomas generally exhibit low proliferative potential, as assessed by PCNA, AgNORs, and DNA flow cytometry. However, these tumors can recur, necessitating careful monitoring despite their typically benign clinical course.
Area of Science:
- Neuro-oncology
- Pathology
- Molecular Biology
Background:
- Central neurocytomas are rare intraventricular tumors.
- Understanding their proliferative potential is crucial for predicting biological behavior and clinical outcomes.
Observation:
- A study analyzed 13 central neurocytomas diagnosed between 1982 and 1993.
- Tumors were primarily located in the lateral and third ventricles.
- Histological diagnosis involved light microscopy, immunohistochemistry, and electron microscopy.
Findings:
- Proliferative potential was assessed using proliferating cell nuclear antigen (PCNA), nucleolar organizing regions (AgNORs), and DNA flow cytometry.
- Most cases showed low PCNA-positive cells (<1%), low AgNORs scores (mean 1.67), and diploid DNA content (proliferation index 5.1-9.6%).
- Despite low proliferative markers, one case recurred after subtotal removal and radiation, and another recurred after total removal.
Implications:
- Central neurocytomas often follow a benign clinical course with low proliferative potential.
- Recurrence is possible, even with low proliferation markers, highlighting the need for vigilant follow-up.
- These findings aid in refining prognostic assessments for central neurocytoma patients.