disease process and others Flashcards

out line of disease threptic options imaging cancer

1
Q

how will metastasis occur

A

invade basement membrane
moves into extracellular matrix/connective tissue
invades blood vessels and lymph

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2
Q

what happens after tumoire reaches the blood

A

it arrests in a distant organ

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3
Q

when are new blood vessels of a tumour needed

A

when it eceeds 2mm

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4
Q

what dose anti-VEGF do

A

inhibits VEGF receptor

this leas to vascular regression and the tuomour us DORMANT

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5
Q

what life style choices lead to cancer

A

smoking
obesity
alcohol excess

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6
Q

how dose cancer hide from our immue system

A

cangers have a ligand (PDL-1) that bind to the T lymphocytes and supress the cell

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7
Q

what is PDL-1 and PDF

A

programmed death ligand 1

programmed deth receptor

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8
Q

what is a ligand

A

a ion or molecule that binds to a central larger molecule

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9
Q

what are the preventative therapeutic cancer options

A

environment/behaviour change

diet

screening

genetics

medicine

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10
Q

what are the therapeutic treatment cancer options

A

surgery
systematic therapy
radiotherapy
immunotherapy

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11
Q

what dose surgery need to ‘cure’ a cancer

A

anatomical clearance so the surrounding area can be cut out

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12
Q

what dose radiotherapy need to ‘cure’ a cancer

A

it needs anatomical coverage

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13
Q

why is cell turnover important

A

you need to due treatment in cycles

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14
Q

what are some immunotherapy’s

A

monoclonal antibodies

‘innate’ immune system

programmed cell death

pathway

CAR T-cell therapy

PD-1 and PDL-1 ANTAGONIS
in use atm

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15
Q

what is CT imaging used for in relation ship to cancer

A

diagnosis

staging - assecs local spread

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16
Q

what are the MRI indications

A

excellent soft tissure detail

vessels can be seen

17
Q

why should imaging investigations be used only when appropriate

A

expensive AF

in some cases radiation

18
Q

what are the pros and cons of screening

A

early detection - better prognosis

some times expensive

19
Q

what are the principles of screening

A

there should be a latent stage - (long time before ypu die)

test available and be acceptable

treatment is available

20
Q

what are the contradictions to MRI

A

claustrophobic and noisy

motion can cause ARTIFACTS

cannot image people with pacemakers or aneurism clips

21
Q

what are some examples of contract agents

A

gadolinium DTPA - iv contrast - vascular lesions can be seen more easily

22
Q

how does a MRI work

A

the powerful magnet, aligns all the protons in the same direction

Short bursts of radio waves are then sent out knocking the protons out of alignment.

the radio waves are turned off, the protons realign. and send out radio signals, which are picked up by receivers.