Question
Regarding Myxopapillary ependymoma, consider the following statements:
- It is a WHO Grade I tumor
- It follows an aggressive clinical course
- It commonly arises from the filum terminale of the spinal cord
- It consists of mucopolysaccharide-rich stroma with a papillary core containing blood vessels
Which of the above statements are correct?
| A. |
1 and 4 are true; 2 and 3 are false
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| B. |
1, 3, and 4 are true; 2 is false
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| C. |
1, 2, and 4 are true; 3 is false
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| D. |
All are true
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Show Answer
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Correct Answer » B
Explanation
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Myxopapillary ependymoma is a distinct subtype of ependymoma, commonly tested in pathology and neurosurgery due to its location and histological features.
Explanation of Each Statement:
- WHO Grade I tumor → True
- Myxopapillary ependymoma is classified as a low-grade (benign) tumor
- Follows an aggressive clinical course → False
- It is generally slow-growing with favorable prognosis
- May recur locally but is not aggressive
- Commonly arises from filum terminale → True
- Most common site: conus medullaris and filum terminale
- Histology description → True
- Characteristic features:
- Myxoid (mucopolysaccharide-rich) stroma
- Papillary structures with vascular cores
