Anatomy MCQ 0057

Most common site of spinal tumour

1. Extramedullary intradural
2. Extra dural
3. Intra medullary
4. Extra medullary extradural

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The Correct option is D

Explanation with High Yield Facts:

Spinal cord tumours- Epidural metastatic tumours are the most common.

• Most common - neoplastic cord compression is nearly always due to extra-medullary, extradural metastases usually from breast, lung, prostate, lymphoma or renal cancers.
• Compression usually occurs by posterior expansion of vertebral metastases or extension of Para spinal metastases through the intervertebral foramina.
• These result in demyelination, arterial compromise, venous occlusion and vasogenic oedema of the spinal cord, all contributing to myelopathy. 70 % occur in the thoracic spine, 20 % lumbar spine and 10 % cervical spine.
• Ependymomas are the most common primary spinal tumour, accounting for about 66 % of all intramedullary tumours. They are usually located around the lower cord, conus medullaris and filum terminale.
• Spinal astrocytoma are the second most common primary spinal tumour, accounting for about 30 % of all intramedullary tumours

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