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Cauda equina tumor with ependymal and paraganglionic differentiation.
D V Caccamo1, K L Ho, J H Garcia
1Department of Pathology, Henry Ford Hospital, Detroit, MI 48202-2689.
Human Pathology
|July 1, 1992
Summary
This study reports a rare cauda equina tumor exhibiting both ependymoma and paraganglioma features. This unique case highlights dual glial and neuroendocrine differentiation in a spinal tumor.
Area of Science:
- Neuro-oncology
- Surgical Pathology
- Spinal Cord Neoplasms
Background:
- Choroid plexus papillomas can occur in the central nervous system.
- Neoplasms in the cauda equina region can present with diverse histological features.
Observation:
- A 31-year-old woman developed a cauda equina tumor 10 years after treatment for a fourth ventricle choroid plexus papilloma.
- The cauda equina tumor showed areas of papillary ependymoma and paraganglioma.
- Immunohistochemistry and electron microscopy confirmed glial and neuroendocrine differentiation.
Findings:
- The tumor displayed features of both ependymoma (glial fibrillary acidic protein, S-100 protein) and paraganglioma (neuron-specific enolase, synaptophysin, chromogranin, serotonin).
- Electron microscopy revealed intercellular lumina, microvilli, and dense core granules, supporting dual differentiation.
- This represents the first reported case of a cauda equina neoplasm with simultaneous ependymal and paraganglionic differentiation.
Implications:
- This case expands the differential diagnosis for cauda equina tumors.
- Understanding dual differentiation is crucial for accurate diagnosis and treatment planning.
- Further research may elucidate the origins and behavior of such mixed tumors.