CNS TUMORS

Question 1

Primary intracerebral tumors originate from

Answer 1

Brain substance, neuroglia, neurons, cells of the blood vessels, and connective tissue.

Question 2

Primary extra cerebral tumors originate outside the substance of the

Answer 2

Brain

Question 3

Primary extra cerebral tumors include

Answer 3

Meningiomas, acoustic nerve tumors, and tumors of the pituitary and penial glands

Question 4

Can’t be found inside or outside the brain substance

Answer 4

Metastatic or secondary tumors

Question 5

CNS tumors include tumors of the

Answer 5

Brain and spinal cord

Question 6

The second most common group of tumors in children

Answer 6

CNS tumors

Question 7

Clinical manifestations of cerebral tumors

Answer 7

effects are varied: can include seizures, visual disturbances, unstable gait, and cranial nerve dysfunction

Question 8

An obstruction of the ventricle system or hemorrhage occurring around the tumor can result in

Answer 8

Increased ICP

Question 9

This type of tumor does not metastasize because there is no lymphatic channels

Answer 9

Intercranial brain tumors

Question 10

If metastasis occurs from an intracranial brain tumor it is usually due to

Answer 10

Seeding of cerebral blood through CSF, during cranial surgery, or through artificial shunts.

Question 11

Comprise 50% to 60% of all adult brain tumors and include astrocytomas, oligodendrogliomas, mixed oligodendrogliomas, ependymomas, and immunohistologic. Characteristics

Answer 11

Primary brain tumors (Intracerebral)also called gliomas

Question 12

How many grades does the WHO divide Gliomas into

Answer 12

4

Question 13

WHO a grade one

Answer 13

Pilocytic astrocytoma

Question 14

WHO grade 2 also classified as low-grade glioma

Answer 14

oligodendrogliomas

Question 15

Grade diffuse astrocytoma

Answer 15

WHO grade II

Question 16

The most common primary CNS tumor comprises 50% of all brain and spinal cord tumors

Answer 16

Astrocytoma

Question 17

One third of astrocytomas are classified at diagnosis as grades

Answer 17

Grade one or grade 2

Question 18

Astrocytomas are located most commonly in the

Answer 18

Cerebrum, hypothalamus, or pons

Question 19

Clinical manifestations of astrocytoma

Answer 19

Headache and subtle neurobehavioral changes or an early symptom
50% experience a focal or generalized seizure.
Increased ICP is usually a late clinical manifestation

Question 20

Comprises 2% of all brain tumors and 10% to 15% of all gliomas

Answer 20

oligodendrogliomas

Question 21

Slow growing well differentiated tumors, often with cysts and calcifications present

Answer 21

oligodendrogliomas

Question 22

More than 50% of individuals experience of focal or generalized seizure as the first clinical manifestation. Also 50% experience increased ICP at the time of diagnosis.

Answer 22

Patients with a oligodendrogliomas tumor.

Question 23

Glioma that arises from the ependymal cells that form the walls of the ventricles and grow either into the ventricle or into adjacent brain tissue: they are not encapsulated.

Answer 23

ependymoma

Question 24

They compromise 6% of all primary brain tumors in adults and 10% and children and adolescents.

Answer 24

ependymoma

Question 25

70% of these occur in the fourth ventricle and manifest as trouble with balance, unsteady gait, uncoordinated muscle movement, and difficulty with fine motor skills.

Answer 25

ependymoma

Question 26

Sometimes this tumor can arise in the third ventricle and can manifest as seizures, visual changes, and contralateral weakness of a body part on one side of the body.

Answer 26

ependymoma

Question 27

Clinical manifestations of ependymoma

Answer 27

If CSF pathway is blocked by tumor, there may be headache, nausea, and vomiting related to hydrocephalus.

Question 28

If ependymoma involves the brainstem are upper spinal cord there may be

Answer 28

Neck pain

Question 29

Meningioma, nerve sheath tumors, and brain metastasis are examples of

Answer 29

Primary extra cerebral tumors

Question 30

Classified as primary intracerebral tumors are primary extra cerebral tumors

Answer 30

Primary tumor