CANCER Flashcards

1
Q

What is cancer

A

uncontrolled cell growth, not faster rate of growth

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2
Q

what is a neoplasm

A

abnormal growth of cells

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3
Q

etiology/pathophysiology of cancer

A
  1. carcinogen
  2. initiation
  3. promotion ‘
  4. tumour formation
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4
Q

main cause of death in cancer

A

cachexia

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5
Q

sarcoma

A

connective tissue

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6
Q

carcinoma

A

epithelial tissue

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7
Q

lymphoma

A

lymphatic tissue

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8
Q

TNM diagnosis system

A

T- how big is the tumoir
N- node involvement
M- metastes?

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9
Q

med management of cancer

A

surgery
chemo
immunotherapy
radiation

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10
Q

why is chemo given in cycles

A

resistance
also need time for healthy cells to rebuild
toxic to bone = wbc loss, platelets, anemia

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11
Q

main types of chemo

A
  1. dna synthesis inhibitors
  2. dna replication inhibitors
  3. hormones
  4. immunotherapy
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12
Q

types of radiation

A

external beam therapy
brachytherapy
systemic radiation

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13
Q

external beam therapy

A

machine outside body, targets cancer area

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14
Q

brachytherapy

A

radioactive material placed inside, taget area closley

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15
Q

systemic radiation therapu

A

radioactive drugs via oral or veins

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16
Q

radiation side effects

A

fatigue
anorexia
dysguisia

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17
Q

dysguisia

A

altered sense of taste

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18
Q

immunotherapy types

A

immune checkpoint inhibitors
t cell transfer therapy
monoclonal antibodies
cancer treatment vaccines

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19
Q

what is the main goal in nutr managament of cancer

A

prevent malnutrition

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20
Q

how is nutr managament affected by cancer

A

via cancer itself
via medical management

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21
Q

why is MN concerning in cancer

A

effects the effectiveness of treatment
- surgery = dont recover quick
- chemo = decreased tolerance
- radiation = wt changes = tattpp accuracy
- immunotherapy = immune sustem not working as well

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22
Q

why woukd chemo not work well if ur MN

A

meds are metabolized in lean muscle tissue
mn = loss of tissue = toxic
= treatment delays = poor effieciency

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23
Q

caxechia

A

type of protein energy MN ‘
its wt loss bc of metabolic changes

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24
Q

signs of cachexia

A

severe wt loss
anorexia
nuausea
early satiety
muscle wasting
increased REE
immunosuppression
fluid retention

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25
what makes caxechia special?
its metabolic changes that cause equal mobilization of fat and muscle protein even tho ur eating properly when normally it should be only fat
26
an obese cancer pt is still at risk for caexchia
yes - bc the pt loses muscle mass but retains fat mass - losing wt but still obsese - low mucles/high fat mass = problem
27
when woudl you see hypometabolism ina cancer pt
when there is muscle wasting less muscle = less metabolically active tissue = hypometabolic
28
how is EE affected in cnacer
can cause hypo, hyper and normo metabolism
29
starvation REE vs cancer REE
starvation = losing mass but low M rate cancer = losing mass but high M rate
30
fat metabolism in cancer
increased lipolysis decreased lipgenesis = fat loss and hypertriglyceridemia
31
why increased fat breakfown in cancer
cancer = release cytokines = signals tissues to release fat
32
# cho cho metabolism in cancer
everything working to increase glucose levels bc cancer cells love it - IR, glucose intolerance - gluconeogensis - cori cycle - =pt usually hyperglycemi
33
usual glycemic state for cancer pt
hyperglycemic
34
how does improper cho metabolism drive caxechia
over reliance on fat and protein for energy source inflamm cytokines= ir glucoeoegensns = skm breakfown for glucose formation
35
what happens to pro metabolism in cancer
overall increased depletion of FFM
36
drivers of FFM loss in cancer
- AA not spared - increased proteolysis, decreased synthesis = muscle wasting - AA leftover prioritized for acute phase proteins since they respond to stress/inflammation
37
cho metabolism in starvation vs cancer
starvation - protein spared from being used as fuel = less proteloysis = less FFM depleton -preferred breakdown of fat over muscle cancer - protein AA not spared - both fat and muscle breakdown preferred
38
cancer nutr management; how do we adjust EE
REE x 0.7-1.7 (stress factor)
39
cancer nutr management; how much protein
0.5-2 g/kg
40
cancer nutr management; how much cho
individualized
41
cancer nutr management; how much fat
individualized
42
cancer nutr management; how much Mv
RDA levels but nooooo antioxidants
43
cancer nutr management; how much fluid
35 mL/kg
44
what do chemo and radiation affect mostly?
side effects related to GIT bc they are dividing quick cells
45
Non metabolic contributors to MN in cancer
1. hypermetabolism 2. anorexia 3. malabsorption/diarrhea 4. mucositis/esophagitis 5. dysgeusia 6. xerostomia
46
treatment for hypermetabolism
high protein high energy intake
47
causes of anorexia in cancer
- psycological state - tumour in GIT =obstruction - tumour releasing cytokines - side effect of treatment
48
ways to treat anorexia in cancer
- max kcal in every bite - limit low e foods - limit high fiber foods - small frequent meals snacks - cold foods better tolerated - avoid meal prep/smell of food
49
malabsorption and diarrhea causes in cancer
tumour obstruction MN cuases villi to flatten nature of therapy
50
treatment of diarrhea in cancer
- meds - small frequent meals - limit bowel stimulant foods - decrease fat intake, lactose - more soluble fibre = bulking - k rich foods
51
mucositis and esophagitis causes in cancer
bc of treatment
52
treating muscositis esphogitis
no hot, spicy salty sharp foods soft moist foods fluid intake rinse mouth often antacids for esophagitis
53
causes for dysgeusia
bc of treatment rapidly dividing cells always affected
54
treatment for dysgeusia in cancer
- rinsing mouth before after eating - drinking w meals - experiment w food flavours - mild tasting foods - adding mixed foods with meat or acid - plastic cutlery - avoiding fav foods
55
xerostomia causes cancer
treatment
56
treating xerostomia in cancer
- water intake - oral sprays - saliva subs - humidifier - chew gum, candiesm - xylotol pastilles
57
Non Nutr related issues in cancer
1. eutopic hormones 2. hypercalcemia 3. osteomalcia 4. hyponatremia 5. anemia
58
whats the issue with increased eutopic H
cancer makes toooo much release of these hromones = metabolic issues
59
examples of eutropic H issues in cancer
breast cancer = too much insulin = hypoglycemia lung cancer = too much calcitonin = ca metabolism overall metabolic rate affected
59
how can we treat eutrophic h issues in cancer
glucose metabolism = meds similar to t2d treatment closely minitor needs
59
causes of hypercalcemia in cancer
overall increased bone breakdown via hormones that promote resorptoon - bone mestastis - PTH increase - calcitriol oroduction
60
how do u treat hypercalcemia in cancer
never reduce diet Ca - increase fluids = excrete Ca - calcitonin in meds = increases excretion and decreasing resorption
61
osteomalacia causes
bones soft n weak due to tumours releasing less calcitriol, pth, hypocalcemia, hypophospahtemia
62
treatment of osteomalacia
remove tumour
63
causes of hyponatremia
tumor or treatment
64
treating hyponatremia in cancer
fluid restriction meds saline infusion
65
anemia causes in cancer
nutr def hemolysis via chemo bone marrow failure
66
anemia tratment in cancer
fix underlying problem suppmelentation