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Ependymosarcoma with eosinophilic granular cells.
Summary
This study reports a rare case of ependymosarcoma, a malignant glioma with glial and sarcomatous parts, featuring unusual eosinophilic cells. The aggressive tumor disseminated rapidly, highlighting the need for further research into this rare brain cancer.
Area of Science:
- Neuro-oncology
- Pathology
- Cancer Biology
Background:
- Ependymosarcoma is a rare malignant glioma characterized by both ependymal and sarcomatous components.
- This entity presents diagnostic challenges due to its mixed cellular composition.
Observation:
- A rare case of ependymosarcoma with eosinophilic cells occurred in the right lateral ventricle trigone of a 62-year-old male patient.
- The patient presented with a 2-month history of headaches and a hard, gray mass was identified during surgery.
Findings:
- Histological examination revealed intermingled anaplastic glial and sarcomatous components.
- Immunohistochemistry showed sarcomatous cells positive for α-smooth muscle actin and desmin, while glial cells were negative.
- Tumor cells exhibited focal ependymal and myofibroblastic differentiation, with approximately 10% showing eosinophilic granules positive for αB-crystallin, HSP 27, and GFAP.
Implications:
- The findings support the classification of this case as ependymosarcoma according to established criteria.
- The aggressive nature of the tumor, leading to rapid dissemination despite treatment, underscores its poor prognosis.
- Further investigation into the unique eosinophilic cell component and its role in ependymosarcoma pathogenesis is warranted.
