GYN Flashcards
What is a type I hysterectomy?
- Simple hysterectomy
- Peritoneal washings prior to resection
- Removal of
- Fascia of cervix
- Lower uterine segment
- Full uterus
- Ovaries removed for staging and to stop estrogen production
Type II hysterectomy
- Modified radical hysterectomy
- Removal of
- Uterus
- Lower uterine segment and cervix
- Upper 1/3 (1-2 cm) of the vagina
- Unroofing ureters to resect parametrial tissue and paracervical tissue
- Lymphadenectomy
- Uterine vessels ligated medial to ureters
- Uretosacral ligament ligated midway between uterus and sacrum
Type III hysterectomy
- Radical hysterectomy
- All Type II parts
- Ureters mobilized as well as bladder and rectum
- Resected parametrial tissue to pelvic side wall
- Resection of 1/3 to 1/2 of vagina
Which cancers get Type I hysterectomy
Most endometrial
Some 1A1 cervix
What cancer get Type II hysterectomy
Cervical cancer IA2
Endometrial cancer with cervical involvement
Which cancers need type III hysterectomies
Most cervical cancers IB+
Which histologies need omental biopsy
Serous endometrial
Clear cell
Carcinosarcoma
What are the procedures for cervical sampling?
- Conization
- LEEP (Loop Electrosurgical Excision Procedure)
- Trachelectomy
What is conization
En bloc removal of ectocervix and endocervix canal
What is a trachelectomy
All cancer removed with margin
Internal os remains and stitches closed
Can carry pregnancy with c-section for delivery
How can fertility be spared for women getting gyn RT
Ovarian transposition
What is the target ovarian dose for maximal fertility sparing
8 Gy
How many strains of HPV does current vaccine protect against
9
What is the current recomendation for HPV vaccination
- Both boys and girls
- Age 11-14: 2 shots, 6-12 months apart
- Age 15-26: 3 shots q1-2m
What aged women should get cervical cancer screening
21-65
What is screening guideline for women 21-29
Pap q3 years
What is screening rec for woman age >30
Pap and HPV testing q5 years
How to manage ASCUS
- Most resolve spontaneously
- Get HPV test
- If + do colposcopy
- If - get repeat Pap and HPV test in 12 months
What is acute toxicities of gyn RT
Epilation
Hyperpigmentation
Urethritis/Cystitis
Erratic bowel function
Tenesmus
Light bleeding
Pruritis
Vag discharge
Late toxicity of gyn RT
Vaginal stenosis, thinning, dryness
Fistulas
Bowel obstruction
Bladder injury
Pelvic fractures
Sterilization (2-3 Gy)
Ovarian failure (8-10 Gy)
Lymphedema after inguinal nodal surgery/RT
History for cervix cancer
Sexual history
HIV/STDs
Smoking
DES exposure
Exam for cervix cancer
- Abdominopelvic exam
- PE to assess inguinal nodes
- Gyn exam
- Speculum to assess tumor size, vaginal involvement, PM and sidewall involvement
- Bimanual to assess rectal involvement / fixed
- Pap smear
Labwork for cervix cancer
Pap smear
CBC
CMP
HIV
UA
How to obtain tissue for diagnosis
EUA with biopsy
Perform cystoscopy and proctoscopy if concern for inavsion
What imaging to obtain for cervix cancer
- Stage I: CXR
- Stage II+
- PET or CT CAP
- Pelvic MRI
How to approach woman with symptomatic bleeding with cervix cancer
Pack the vagina
Transfuse Hgb > 10
Embolize if possible
Palliative RT (6 Gy in 2 fx) and incorporate into definitive dose
What is the general goal for cervix cancer treatment
Avoid tri-modality therapy
Which patients tend to be cured with surgery alone
Less than FIGO IB2
Surgery preferred for younger woman
In FIGO 2018 staging, what tests can be included for stging
All clinical and imaging modalities, including MRI to assess for parametrial invasion
Can include exploratory surgery
What is FIGO cervical stage: I
confined to cervix
What is FIGO cervical stage: IA
Microscopic tumor < 5 mm
- IA1: <3 mm DOI
- IA2: 3-5 mm DOI
What is FIGO cervical stage: IB
- Visible cervical tumor
- IB1: <2cm
- IB2: 2-4 cm
What is FIGO cervical stage: II
Beyond cervix but not lower 1/3 of vagina or to pelvic side wall
What is FIGO cervical stage: IIA
- IIA1: <4 cm out of cervix
- IIA2: >4 cm beyong cervix, in upper 2/3 of vagina
What is FIGO cervical stage: IB3
>4 cm (bulky, visible, confined to cervix)
What is FIGO cervical stage: IIB
Parametrial involvement
What is FIGO cervical stage: III
More advanced, lower vagina, pelvic side wall, N+
What is FIGO cervical stage: IIIA
Lower 1/3 vaginal involvement
What is FIGO cervical stage: IIIB
Pelvic side wall involvement
What is FIGO cervical stage: IIIC
N+
Risk of pelvic LN for IB
15%
Risk of pelvic LN for cervical stage II
25%
Reminder stage II is outside cervix but not to pelvic side wall or lower 1/3 of vagina
Risk of pelvic LN for stage III
50%
Reminder: stage III is lower 1/3 vagina, pelvic side wall or N+
Rule of thumb for risk of PA nodal involvement for cervix cancer
pelvic nodal risk / 2
Stages of cervix cancer
IA- microscopic, confined to cervix
IB- macroscopic, confined to cervix
II - outside of cervix but not to lower 1/3 of vagina
IIIA - lower 1/3 vagina
IIIB - pelvic sidewall
IIIC - nodes
IV - bladder, rectum etc.
How to obtain cervical tissue for diagnosis
- Gross lesion –> punch bx and endocervix curettage
- No lesion –> colposcopy and directed bx
- If both above are negative –> conization
What is the treatment approach for stage IA cervical cancer?
- Treatment approach is SURGERY alone
- Type of surgery depends on stage IA1 or IA2
- Reminder
- IA1 = <3 mm DOI
- IA2 = 3-5 mm DOI
- Reminder
Management options for IA1 cervix
- In general surgery is best
- Type I hysterectomy WITHOUT PLND
- Other options include:
- Conization
- LEEP
- Cyrosurgery
- Radical trachelectomy
- Brachy alone (7.5 Gy x 5)
If for IA1 cervix woman has simple hysterectomy and found to have risk factors, next step
Consider Type II and PLND
Management options for IA2 cervical cancer
- Type II (modified radical) hysterectomy and BSO
- Adjuvant therapy based on Sedlis/Peters criteria
- Typically 50.4 Gy in 28 daily 1.8 Gy fractions
- RT alone
- 45 Gy pelvic EBRT + cervical BT (Point A dose = 80 Gy)
If a young woman is getting RT alone for cervix cancer, how to prevent ovarian failure?
Oophoropexy
What is 5 year OS for stage IA1 and IA2 cervix cancer
IA1: 95%
IA2: 85%
What are the criteria for women who are candidates for radical trachelectomy
- Size < 2cm
- No LN
- No LVSI
Following surgery for cervical cancer, what dictates adjuvant therapy options?
- Intermediate risk per Sedlis criteria –> RT alone (50.4 Gy)
- Size > 4 cm
- LVSI
- Depth of cervix invasion
- High risk per Peters criteria –> Pelvic RT to 50.4 Gy with weekly cisplatin (40 mg/m2)
What stages of cervical cancer can we consider for surgery or RT
Early stages only
IA, IB1, IB2 and select IIA1
What stages of cervix cancer can get less than radical hysterectomy
IA1 - simple hys
IA2 - modified radical
Everything else should get radical hys
Treatment options for stage IB1, IB2, IIA1
- In general, these patients can be managed with either surgery or RT alone, with adjuvant therapies as dictated by risk factors
- Surgery
- Type III hysterectomy +/- PLND +/- PA dissection
- Adjuvant therapy per risk factors
- Adjuvant EBRT +/- vaginal brachy per Sedlis
- Adjuvant CRT per Peters
- Radiation alone
- 45 Gy pelvic EBRT + Brachy (point A dose of 80 Gy)
- Fertility sparing option (if <2 cm)
- Radical trachelectomy + PLND
What should be considered for IB2 patients?
In trials, nearly 90% needed adjuvant RT so probably makes sense to consider definitive RT
What side effects are higher with surgery –> adjuvant therapy for GYN malignancies?
Urinary
SBO
Sexual toxicity
For definitive cervix RT, early stage, what is the RT doses
EBRT of 45 Gy
Brachy therapy to Point A dose of 80 Gy
What defines intermediate risk Cervical Cancer?
- Sedlis criteria
- Eligibility criteria
- >4 cm
- LVSI
- Deeper than 1/3 invasion
- Need 2 of these criteria to warrant adjuvant therapy
What is the adjuvant treatment for intermediate risk cervical cancer
EBRT to 50.4 Gy to full pelvis
Improves PFS, LR, NOT OS
What modality to deliver post op RT for cervix cancer
IMRT, decreases GI/GU tox
What defines high risk post-op patients after hysterectomy for cervical cancer?
- Peters Criteria
- Positive margin
- Positive Lymph nodes
- Parametrial extension
What is the adjuvant treatment for high risk cervix cancer post op
- CRT
- IMRT to 50.4 Gy in daily 1.8 Gy fractions
- Weekly cisplatin 40 mg/m2
What is the advantage of adjuvant CRT for high risk cervical ca
OS benefit: 10%
Treatment options for stage IB3 and IIA2 cervix cancer
- Reminder
- IB3: >4 cm (bulky) in cervix
- IIA2: >4 cm beyond cervix in upper 2/3 vag
- These patients should get definitive CRT
Definitive CRT regimen for locally advanced cervix cancer
- Weekly cisplatin 40 mg/m2
- EBRT to 45 Gy (using 3DCRT, 4 field)
- Cervix brachytherapy to Point A dose of 85 Gy
- 7 Gy x 4 (BID, spaced one week apart)
Schedule for interventions if getting EBRT then brachy
- Finish 25 fx of EBRT
- Next day get HDR brachy inserted
- First treatment that evening
- Admit to hospital
- Next treatment following morning
- Removal and discharge
- Return and repeat 1-5 one week later
5 year OS for IB3 or IIA2 cervix cancer
70%
Treatment of stage IIB cervical cancer
- Parametrial involvement
- CRT
- 45 Gy to pelvis with weekly cis 40 mg/m2
- Parametrial boost 540 cGy
- Brachytherapy to point A dose of 85 Gy
Treatment of stage IIIA cervical cancer
- Reminder: lower 1/3 of the vagina
- Definitive CRT
- EBRT to 45 Gy with weekly cisplatin
- Parametrial boost?
- Brachytherapy to Point A dose of 85 (consider using vaginal cylinder or implant for vaginal disease)
- Cover inguinal nodes
Treatment of stage IIIB cervix
- Pelvic sidewall involvement or hydronephrosis
- Definitive CRT
- Stent for hydronephrosis
- Boost pelvis with 540 cGy
- HDR brachy 7 Gy x 4
Treatment of stage IIIC cervical cancer
- IIIC1 - pelvic nodes
- IIIC2 - PA nodes
- Definitive CRT
- Consider boosting affected nodes to 225 x 25 = 5625 cGy
Treatment of Stage IVA cervical cancer
Definitive CRT
5 year OS of 10%
Cervix ca patients who don’t need parametrial boost
- Earlier stage (IA-IIA) without parametrial involvement
- Significant pelvic nodes getting boosted
- Bulky parametrial disease likely to get interstitial implant
Where is Point A
2 cm superior and lateral to Os
Point A doses
80 Gy for cervix confined disease or IIA
85 Gy for anything more advanced
General follow-up for GYN malignancies after treatment
- H&P q3-6 months x2 years, q6 months through 5 years, annual after
- PET 3-6 months post
- Cervix and vaginal cytology screening
- Dilator usage
- Risk reduction education
Simulation for intact cervix (endometrial or cervix)
- Supine in alpha cradle (if IMRT)
- Consider prone if doing 3DCRT
- IV and small bowel contrast
- Vaginal barium or marker
- Full bladder scan
- Fuse PET and/or MRI for disease delineation
3D superior border of intact pelvic field
Typically L5-S1
Consider L4-L5 if common iliacs are involved
For 3D pelvic field inferior extent
3 cm below tumor or bottom of obturator foramen
3D pelvic field, lateral extent
1.5-2 cm lateral to pelvic brim
Ensure good margin on obturator nodes
3D pelvic field, anterior extent
1 cm anterior to the pubic symphysis
3D pelvic field - posterior extent
Behind sacrum
Should femoral heads be blocked with 3D pelvic field
No
If doing a parametrial boost what is the dose
5.4 Gy in 3 fractions of 1.8 Gy
What is the total dose to parametrial or pelvic sidewall
60 Gy
45 Gy whole pelvis
5.4 Gy parametrial boost
20% of HDR boost
What is Point B
surrogate for pelvic sidewall
Describe parametrial block
Sup/inferior block extending from inferior edge of the field to roughly isocenter blocking the cervix/uterus (about 9-12 cm)
Block should be ~4 cm wide at midline
If treating common iliac nodes, how high should you treat
L1/L2
If treating PA nodes, how high should you treat
Renal vessels or ~T12
Why should IMRT be chosen for intact cervical fields
- Covering PA or inguinal nodes
- SIB for nodes or sidewall
- Decreases GI/GU and bone marrow tox
- Decreases pelvic fractures
How to contour intact cervical volumes for IMRT
- Create CTV1 = GTV, cervix, uterus
- PTV1 - 2 cm expansion with daily IGRT
- Create CTV2 = parametria and vaginal CTV
- PTV2 - 1 cm expansion
- Create CTV3 = nodes which are vessels + 7mm (exlcude bowel, bone, muscle)
- Cover obturator, Int Iliac, Ext. Iliac, Common Iliac, Pre-Sacral to S3
- If involved - common iliac to L1
- If involved - PA nodes to T12
- PTV3 - 7 mm expansion
Determining vaginal coverage for CTV2 (intact cervix) IMRT
- No vaginal involvement = cover upper half
- Upper vaginal involvement = cover upper 2/3
- Extensive vaginal involvement = cover full vagina
When should parametrial boost be given
Can do it SIB or sequential after the 45 Gy between the two brachy insertions
Contouring postop cervix IMRT
- Create CTVp
- Vaginal ITV (full and empty bladder)
- Parametria
- At least 3 cm of vagina
- Create CTVn
- 7 mm expansion of vessels off bone/bowel/muscle
- Include obturator, internal iliac, external iliac, common iliac
- Inguinals if lower vagina involved
- GTV nodes (not resected)
- PTV margins
- 7 mm for CTVp and CTVn
- 3 mm for nodes
Combined Point A dose if adjuvant
75 Gy
When contouring gyn cases, OARs should be contoured on which scan
full bladder
When is the optimal time from surgery to perform vaginal cuff brachy
When it is healed
Pref 4-6 weeks
How should a vaginal cylinder be selected?
Largest diameter to minimize mucosal surface dose