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Dosimetry > Gyn CA > Flashcards

Gyn CA Flashcards

1
Q

gyn fornix is point of attachment b/n ? & ?

A

cervix & vagina

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2
Q

gyn internal os is where cervix meets

A

cervical canal

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3
Q

gyn most radiotolerant area

A

uteral canal

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4
Q

vulva ca pathology

A

scc

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5
Q

vulva ca etiology

A

associated with DES

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6
Q

vaginal ca usual pathology

A

scc

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7
Q

vaginal ca most common location

A

posterior upper 1/3

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8
Q

vaginal ca tx inguinal if disease is ?

A

in lower 2/3

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9
Q

cervical ca pathology

A

scc

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10
Q

cervical ca most common site

A

squamous columnar junction

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11
Q

cervical ca xrt sup borders

A

L4/5

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12
Q

cervical ldr dose rate

A

40-60 cGy/hr

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13
Q

cervical hdr dose rate

A

20-50 cGy/min

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14
Q

endometrial ca pathology

A

adenocarcinoma

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15
Q

endometrial ca cure rate

A

high

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16
Q

endometrial ca brachy when uterus is still intact

A

heyman capsule to total dose 65-90 Gy

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17
Q

whole abd or abd-pelv region used to tx what gyn ca

A
  • ovarian

- endometrial

18
Q

ovarian ca radiosensitivity

A

most radiosensitive

19
Q

cervical ca xrt inf border

A

obturator foramen (unless vag involved- then 4 cm lower than extent of disease)

20
Q

cervical ca xrt lat border

A

1.5-2 cm to pelvic sidewall

21
Q

cervical ca xrt ant border

A

pubic symphysis

22
Q

cervical ca xrt post border

A

splitting sacrum including S3

23
Q

cervical ca midline block shields bladder at ? Gy

A

65Gy

24
Q

cervical ca midline block shields rectum at ? Gy

A

70 Gy, sm bowel @ 50 Gy)

25
Q

cervical ca midline shields small bowel @ ? Gy

A

50 Gy

26
Q

cervical ca midline block done if patient receives

A

implant

27
Q

cervical hdr isotope

A

Ir-192

  • uterus & cerv tolerate ext high doses of 200 Gy
  • point A= 2 cm sup to cerv os, 2 cm lat to endocerv canal, < 60-65 Gy
28
Q

cervical ca hdr; uterus & cervix can tolerate doses +

A

200 Gy

29
Q

cervical ca hdr point A=

A
  • 2 cm sup to cerv os

- 2 cm lat to endocerv canal

30
Q

cervical ca hdr point A dose

A

< 60-65 Gy

31
Q

endometrial ca xrt dose

A

50-60 Gy

32
Q

endometrial ca xrt sup border

A

L5-S1

33
Q

endometrial ca xrt inf border

A

bottom of obturator foramen incl at least 1/2 of vagina

34
Q

endometrial ca xrt lat border

A

1-2 cm beyond pelvic wall

35
Q

endometrial ca xrt ant border

A

pubic symphysis

36
Q

endometrial ca xrt post border

A

splitting rectum

37
Q

endometrial ca xrt 4 fld box dose

A

45-50 Gy

38
Q

endometrial brachy ldr done how many fx

A

2 sessions= total 60-70 Gy

39
Q

endometrial brachy hdr done how many fx

A

3-5 fx, 5-7 Gy

40
Q

endometrial brachy hdr to what depth

A

0.5 cm

Dosimetry (53 decks)

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