Anaplastic pilocytic astrocytoma
Eric X Z Yong1, Penny McKelvie2, Michael Murphy3
1Department of Neurosurgery, St Vincent's Hospital Melbourne, P.O. Box 2900, Fitzroy, VIC 3065, Australia.
Summary
This study details three adult cases of de novo anaplastic pilocytic astrocytoma, a rare brain tumor. Management challenges and treatment implications for this aggressive pilocytic astrocytoma variant are discussed.
Area of Science:
- Neuro-oncology
- Pathology
- Neurosurgery
Background:
- Pilocytic astrocytoma is typically a low-grade glioma.
- Anaplastic features in pilocytic astrocytoma are rare and poorly understood.
- De novo occurrence in adults presents unique diagnostic and management challenges.
Observation:
- Three adult patients presented with intracranial masses.
- Histological analysis revealed pilocytic astrocytoma with anaplastic features.
- Key anaplastic features included necrosis, marked nuclear pleomorphism, and high mitotic rate.
Findings:
- The diagnosis of de novo anaplastic pilocytic astrocytoma was confirmed.
- This rare variant exhibits aggressive histological characteristics.
- Clinical presentation and imaging may mimic other intracranial neoplasms.
Implications:
- Early recognition of anaplastic pilocytic astrocytoma is crucial for appropriate management.
- Treatment strategies may need to be intensified compared to typical pilocytic astrocytoma.
- Further research is needed to understand the biology and optimize treatment for this aggressive tumor subtype.
