Cancers of the CNS (Small facts)

Question 1

About how many brain tumors exist?

Answer 1

Over 120

Question 2

CNS tumors are rarely metastatic. True or False?

Answer 2

True

Question 3

Which type of benign CNS tumors are considered malignant due to their site?

Answer 3

Brain tumors

Question 4

What percentage of all cancers are CNS tumors?

Answer 4

1.4%

Question 5

Brain tumors are the ___ leading cause of cancer deaths in children.

Answer 5

2nd

Question 6

As age increases, what happens to the incidence rates of CNS cancers?

Answer 6

increases

Question 7

About how many Cerebrum tumors are gliomas?

Answer 7

Half

Question 8

What are the ratio of high to low grade gliomas?

Answer 8

75% to 25%

Question 9

The cerebrum is the center for? (Only need 3 of 6 to be correct)

Answer 9

Judgment, Reasoning, Emotion, Intelligence, Memory, Learning

Question 10

Cerebellum plays a vital role in the coordination of (Involuntary or Voluntary) Musclar movement?

Answer 10

Voluntary

Question 11

Gliomas make up what percentage of childhood tumors?What structures are mostly involved?

Answer 11

45% and Cerebellum

Question 12

Primary brains tumors are relatively common. True or False?

Answer 12

False

Question 13

Metastatic disease is often detected before the primary site. True or False?

Answer 13

True

Question 14

What are some other prognostic factors of CNS Tumors?

Answer 14

Necrosis of the tumor, Tumor location, and Karnofsky score

Question 15

What does necrosis of tissue indicate in CNS tumor diagnosis?

Answer 15

Malignancy and affects the prognosis

Question 16

What are the function of the Ventricles?

Answer 16

cavities used as a channel for communication with subarach, Spinal canal.

Question 17

What does the gray matter contain?

Answer 17

Supportive nerve cells

Question 18

What does the white matter contain?

Answer 18

bundles of nerve fibers, axon, and dendrites

Question 19

What is the pathway of a neuron? (Think of stingray)

Answer 19

Dendrites receive impulses, body responds by sending impulse down axon, axon wrapped in myelin sheath to keep impulse within axon, and axon terminals release the impulse

Question 20

What cells make myelin?

Answer 20

Schwann cells

Question 21

What are the anterior and lateral portions of the spinal cords surrounded with?

Answer 21

Motor neurons

Question 22

What is the posterior portion of the Spinal cord surrounded with?

Answer 22

Sensory tracts

Question 23

What is the name of the bundle of nerve ends of the spinal cord?

Answer 23

Cauda Equina

Question 24

How much CSF does the CNS contain?

Answer 24

3-5oz

Question 25

What is the most common site of CNS seeding?

Answer 25

Lumbosacral

Question 26

What is the neurological workup consists of evaluating?

Answer 26

Mental status behavior, mood change, thought and speech pattern changes, and intellectual changes

Question 27

What does a positive babinski skin signify?

Answer 27

damage to the nerve path connecting cord to brain

Question 28

Why are intracranial tumors considered malignant?

Answer 28

Based on the limited space for expansion in the cranium

Question 29

What are most gliomas able to become invasive?

Answer 29

no natural capsulation

Question 30

Surgery ranges from debulking to complete microsurgical removal. True or false?

Answer 30

True

Question 31

What does early diagnosis do with mortality and morbidity rates?

Answer 31

Decreases

Question 32

What is given to relieve edema?

Answer 32

steriods

Question 33

Occurrence of acute reactions?

Answer 33

during treatment

Question 34

Occurrence of early delayed reactions?

Answer 34

few weeks to 3 months after tx

Question 35

Occurrence of late delayed reactions?

Answer 35

months to years after tx

Question 36

What were past tx for brain tumors?

Answer 36

lateral ports to whole brain with boost to tumor bed

Question 37

What is the most common intracranial tumor?

Answer 37

brain mets

Question 38

What are the requirements for SRS?

Answer 38

Spherical Lesion and no greater than 3 cm

Question 39

ITV accounts for?

Answer 39

CTV with movement

Question 40

PTV accounts for ?

Answer 40

setup variation and pt movement

Question 41

CTV accounts for ?

Answer 41

GTV and Clinical disease (1-3 cm beyond GTV)

Question 42

Are SRS usually multiple or singular fractions?

Answer 42

Both

Question 43

How many sources of Co-60 does gamma knife have?

Answer 43

201 sources