Cranial and paraspinal nerve tumours

Question 1

Which is the most common cranial/paraspinal nerve tumour?

Answer 1

Schwannoma

Question 2

What are the 7 types of cranial and paraspinal nerve tumours in WHO CNS5?

Answer 2

*Schwannoma
*Neurofibroma
*Perineurinoma
* Hybrid nerve sheat tumour
* Malignant melanotic nerve sheath tumour
*Malignant peipheral nerve sheat tumour
* Cauda equina neuroendocrine tumour (previously paraganglioma)

Question 3

What is a non WHO name of intracranial schwannomas?

Answer 3

neurinomas

Question 4

How many % of (all ages) intracranial tumors are intracranial schwannomas?

Answer 4

6-8%

Question 5

What is the most common location for intracranial schwannomas?

Answer 5

the vestibular division of the vestibulochoclear cranial nerve.

Question 6

What syndrome is associated to multiple schwannomas?

Answer 6

NF2

Question 7

Friom which two cranial nerve cannot schwannomas arrise and why?

Answer 7

• olfactory nerve
• optic nerve

Because the lack sheaths composed of Schwann cells.

Question 8

What 4 CN are the most common for schwannomas?

Answer 8

1- vestibular portion of the vestibulochoclear nerve.
2. Trigeminal nerve
3. facial nerve
4. All the cranial nerves of the jugular foramen= IX, X o XI.