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Extraneural metastases in ependymoma.

H B Newton¹, J Henson, R W Walker

¹Department of Neurology, Memorial Sloan-Kettering Cancer Center, New York, NY.

Journal of Neuro-Oncology

|October 1, 1992

Summary

Extraneural metastases (ENM) are rare in ependymomas, a type of glial neoplasm. This study found 6.2% of ependymomas had ENM, often occurring when the primary tumor was progressing.

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Area of Science:

Neuro-oncology
Pathology
Medical imaging

Background:

Ependymomas are glial neoplasms originating in the central nervous system.
Extraneural metastases (ENM) from ependymomas are exceptionally rare.
This study investigates the incidence and characteristics of ENM in ependymoma patients.

Observation:

A review of 81 ependymomas evaluated between 1956-1989 identified 5 cases (6.2%) with ENM.
Primary tumor locations included the spinal cord (3 patients) and cerebral hemisphere (2 patients).
Patient ages ranged from 3 to 37 years, with ENM developing between 0 and 288 months post-diagnosis.

Findings:

The primary tumor was progressing at the time of ENM diagnosis in 4 out of 5 patients.
Histologic grade and patient age did not correlate with ENM development.
Metastatic sites included the lungs, thoracic lymph nodes, pleura, peritoneum, and liver.

Implications:

Clinicians should consider ENM in ependymoma patients presenting with systemic symptoms like cough or abdominal pain.
The presence of ventriculoperitoneal shunts may be associated with peritoneal metastases.
Further research is needed to understand the mechanisms and risk factors for ENM in ependymomas.

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