Class 2 - Neoplasms of the CNS

Question 1

Brain tumors account for what percentage of all cancers?

Answer 1

2%

Question 2

Where do brain tumors tend to metastasize?

Answer 2

they do not.

Question 3

What percentage of malignant diseases in childhood do brain tumors make up?

Answer 3

20%

Question 4

75% of brain tumors are of what cell origin?

Answer 4

glial cells

Question 5

15% of brain tumors originate from what tissue?

Answer 5

meninges

Question 6

What is the most common benign brain neoplasm?

Answer 6

meningiomas

Question 7

Which brain neoplasm can be surgically resected without residual consequences?

Answer 7

meningiomas

Question 8

What is the second most common intracranial tumor in adults?

Answer 8

meningiomas

Question 9

80% of astrocytomas are…

Answer 9

glioblastoma multiforme

Question 10

What is the most common location of glioblastoma multiforme?

Answer 10

cerebrum

Question 11

Acoustic neuromas are characteristic of what disease?

Answer 11

Neurofibromatosis Type II

Question 12

Ependymomas are more commonly found in ___ in children and _____ in adults.

Answer 12

4th ventricle in children

terminal portion of spinal cord in adults

Question 13

What percentage of brain tumors are metastases from other sites?

Answer 13

50%

Question 14

Which cancers are most likely to metastasize to the brain?

Answer 14

lung cancer

Question 15

Where are most metastatic spinal cord tumors found? What percentage are found there?

Answer 15

thoracic spine (70%)

Question 16

Differentiate neurofibromatosis type I vs. type II

Answer 16

type I sees changes in skin pigmentation and multiple tumor growth in peripheral nerves

type II grows on cranial nerve VIII and affects balance, hearing, etc

Question 17

The incidence of meningiomas is __ x higher in women

Answer 17

10x

Question 18

What are neuromas?

Answer 18

tumors of the cranial/spinal nerves

Question 19

Which glioma has the best prognosis?

Answer 19

non-infiltrating astrocytomas

Question 20

What is the most common and most deadly malignant brain tumor?

Answer 20

glioblastoma multiforme

Question 21

What do glioblastomas tend to cause in the brain?

Answer 21

hemorrhage and necrosis

Question 22

What is the prognosis for glioblastomas?

Answer 22

12-18 months

Question 23

When is the peak incidence of glioblastoma multiforme?

Answer 23

65 years old

Question 24

What is the survival rate of oligodendrogliomas?

Answer 24

5-10 years in 80% of people

Question 25

Oligodendrogliomas make up __% of gliomas

Answer 25

2-3%

Question 26

Non-infiltrating astrocytomas are often found where, in who?

Answer 26

cerebellum of kids/young adults

Question 27

Most primary malignant tumors of the brain originate from…

Answer 27

astrocytes