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principles and procedures > Cancers of the CNS (Small facts) > Flashcards

Cancers of the CNS (Small facts) Flashcards

1
Q

About how many brain tumors exist?

A

Over 120

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2
Q

CNS tumors are rarely metastatic. True or False?

A

True

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3
Q

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

A

Brain tumors

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4
Q

What percentage of all cancers are CNS tumors?

A

1.4%

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5
Q

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

A

2nd

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6
Q

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

A

increases

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7
Q

About how many Cerebrum tumors are gliomas?

A

Half

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8
Q

What are the ratio of high to low grade gliomas?

A

75% to 25%

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9
Q

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

A

Judgment, Reasoning, Emotion, Intelligence, Memory, Learning

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10
Q

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

A

Voluntary

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11
Q

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

A

45% and Cerebellum

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12
Q

Primary brains tumors are relatively common. True or False?

A

False

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13
Q

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

A

True

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14
Q

What are some other prognostic factors of CNS Tumors?

A

Necrosis of the tumor, Tumor location, and Karnofsky score

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15
Q

What does necrosis of tissue indicate in CNS tumor diagnosis?

A

Malignancy and affects the prognosis

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16
Q

What are the function of the Ventricles?

A

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

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17
Q

What does the gray matter contain?

A

Supportive nerve cells

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18
Q

What does the white matter contain?

A

bundles of nerve fibers, axon, and dendrites

19
Q

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

A

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

20
Q

What cells make myelin?

A

Schwann cells

21
Q

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

A

Motor neurons

22
Q

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

A

Sensory tracts

23
Q

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

A

Cauda Equina

24
Q

How much CSF does the CNS contain?

A

3-5oz

25
Q

What is the most common site of CNS seeding?

A

Lumbosacral

26
Q

What is the neurological workup consists of evaluating?

A

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

27
Q

What does a positive babinski skin signify?

A

damage to the nerve path connecting cord to brain

28
Q

Why are intracranial tumors considered malignant?

A

Based on the limited space for expansion in the cranium

29
Q

What are most gliomas able to become invasive?

A

no natural capsulation

30
Q

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

A

True

31
Q

What does early diagnosis do with mortality and morbidity rates?

A

Decreases

32
Q

What is given to relieve edema?

A

steriods

33
Q

Occurrence of acute reactions?

A

during treatment

34
Q

Occurrence of early delayed reactions?

A

few weeks to 3 months after tx

35
Q

Occurrence of late delayed reactions?

A

months to years after tx

36
Q

What were past tx for brain tumors?

A

lateral ports to whole brain with boost to tumor bed

37
Q

What is the most common intracranial tumor?

A

brain mets

38
Q

What are the requirements for SRS?

A

Spherical Lesion and no greater than 3 cm

39
Q

ITV accounts for?

A

CTV with movement

40
Q

PTV accounts for ?

A

setup variation and pt movement

41
Q

CTV accounts for ?

A

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

42
Q

Are SRS usually multiple or singular fractions?

A

Both

43
Q

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

A

201 sources

principles and procedures (27 decks)

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