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Ectopic intrapelvic medulloepithelioma: case report.
D Figarella-Branger1, D Gambarelli, M Perez-Castillo
1Laboratoire d'Anatomie Pathologique et de Neuropathologie, CHU Timone, Marseille, France.
Neuropathology and Applied Neurobiology
|August 1, 1992
Summary
This case report details a rare extraspinal medulloepithelioma in the presacral area with lung metastases. It highlights the potential for primitive neuro-epithelial tumors to occur outside the brain, specifically in the spine.
Area of Science:
- Neuro-oncology
- Pathology
- Developmental Biology
Background:
- Medulloepitheliomas are malignant tumors of primitive neuro-epithelium, typically found in the cerebral hemispheres.
- Extraspinal occurrences are rare, making this case significant for understanding tumor origin and behavior.
Observation:
- A primary extraspinal medulloepithelioma was identified in the presacral region.
- The tumor exhibited characteristic medulloepithelioma morphology with focal ependymal differentiation.
- Immunohistochemistry revealed neuron-specific-enolase, S100 protein, vimentin, cytokeratin, and glial fibrillary acidic protein expression.
Findings:
- Microscopic and ultrastructural analysis confirmed the diagnosis and showed poorly differentiated cells with stratified epithelium.
- Ultrastructural findings provided evidence of ependymal differentiation.
- The tumor presented with lung metastases, indicating aggressive behavior.
Implications:
- This case expands the known anatomical sites for medulloepitheliomas, suggesting a possible origin from undifferentiated embryonic cells in the presacral region, potentially related to neurenteric canal remnants.
- Understanding extraspinal medulloepithelioma origins is crucial for diagnosis and treatment strategies for these rare primitive neuro-epithelial tumors.