Gyn CA Flashcards
gyn fornix is point of attachment b/n ? & ?
cervix & vagina
gyn internal os is where cervix meets
cervical canal
gyn most radiotolerant area
uteral canal
vulva ca pathology
scc
vulva ca etiology
associated with DES
vaginal ca usual pathology
scc
vaginal ca most common location
posterior upper 1/3
vaginal ca tx inguinal if disease is ?
in lower 2/3
cervical ca pathology
scc
cervical ca most common site
squamous columnar junction
cervical ca xrt sup borders
L4/5
cervical ldr dose rate
40-60 cGy/hr
cervical hdr dose rate
20-50 cGy/min
endometrial ca pathology
adenocarcinoma
endometrial ca cure rate
high
endometrial ca brachy when uterus is still intact
heyman capsule to total dose 65-90 Gy
whole abd or abd-pelv region used to tx what gyn ca
- ovarian
- endometrial
ovarian ca radiosensitivity
most radiosensitive
cervical ca xrt inf border
obturator foramen (unless vag involved- then 4 cm lower than extent of disease)
cervical ca xrt lat border
1.5-2 cm to pelvic sidewall
cervical ca xrt ant border
pubic symphysis
cervical ca xrt post border
splitting sacrum including S3
cervical ca midline block shields bladder at ? Gy
65Gy
cervical ca midline block shields rectum at ? Gy
70 Gy, sm bowel @ 50 Gy)
cervical ca midline shields small bowel @ ? Gy
50 Gy
cervical ca midline block done if patient receives
implant
cervical hdr isotope
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
cervical ca hdr; uterus & cervix can tolerate doses +
200 Gy
cervical ca hdr point A=
- 2 cm sup to cerv os
- 2 cm lat to endocerv canal
cervical ca hdr point A dose
< 60-65 Gy
endometrial ca xrt dose
50-60 Gy
endometrial ca xrt sup border
L5-S1
endometrial ca xrt inf border
bottom of obturator foramen incl at least 1/2 of vagina
endometrial ca xrt lat border
1-2 cm beyond pelvic wall
endometrial ca xrt ant border
pubic symphysis
endometrial ca xrt post border
splitting rectum
endometrial ca xrt 4 fld box dose
45-50 Gy
endometrial brachy ldr done how many fx
2 sessions= total 60-70 Gy
endometrial brachy hdr done how many fx
3-5 fx, 5-7 Gy
endometrial brachy hdr to what depth
0.5 cm