Title: Medical Management of Breast Cancer in Premenopausal Women
1Medical Management of Breast Cancer in
Premenopausal Women
- Dr Prue Francis
- Head of Breast Medical Oncology
- Peter MacCallum Cancer Centre
2Pathology Information Required for Optimal
Systemic Therapy Decisions
- Size tumour (invasive component)
- Grade tumour
- Presence of lymphovascular invasion (LVI)
- Lymph node involvement (no. of positive nodes)
- NB negative sentinel node maybe false negative
-
3Pathology Information Required for Optimal
Systemic Therapy Decisions
- ER cells positive and intensity of staining
- PR cells positive and intensity of staining
-
- ER/PR results on Core Biopsy maybe more
accurate. RMH study 9 tumours assessed as
receptor negative on surgical sample had positive
hormone receptors when assessed on core biopsy.
4Pathology Information Required for Optimal
Systemic Therapy Decisions
- HER2 testing best done on surgical sample
unless large tumour planned for neoadjuvant Rx - Also request CISH or SISH testing (HER2 testing
by IHC 6 IHC 1 are HER2 amplified while only
80 of IHC 3 are amplified)
5Premenopausal Early Breast CancerAdjuvant
Systemic Therapy Decisions
- (1) Chemotherapy
- (2) Hormonal Therapy (for ER or PR positive)
- (3) Biologic Therapy (for HER2 positive)
6Premenopausal Early Breast Cancer Adjuvant
Systemic Therapy Decisions
- Have a low threshold for offering some
- form of adjuvant systemic therapy
-
7Tumour Size and Recurrence-Free Survival in Node
Negative Breast Cancer With No Adjuvant Treatment
8Premenopausal Early Breast Cancer Adjuvant
Systemic Therapy Decisions
- Adjuvantonline.com (available on internet)
- Enter data on patient age, health, tumor size and
grade, ER status, lymph node involvement - Gives 10 year prediction of risk of recurrence
and death according to systemic treatments
chosen - (i) none
- (ii) hormone (eg tamoxifen, AI, tamoxifen?AI)
- (iii) chemotherapy (of various intensities)
- (iv) chemotherapy hormone
9Premenopausal Early Breast CancerAdjuvant
Systemic Therapy Decisions
- Adjuvantonline.com imperfect tool
- Cant enter how strongly positive the ER is
- Doesnt include the PR status
- Does not yet include HER2 status/Rx
- Cant enter actual tumour size and nodal status
only a range ( ie. 1-3 nodes)
10Premenopausal Early Breast CancerAdjuvant
Systemic Therapy Decisions Whats New?
- Oncotype DX Assay
- Suitable for node negative ER/PR positive tumors
- Commercial assay based on 21 genes (not funded)
- Patient has to pay 3000 - tumour sample sent
to USA - Recurrence Score (RS) correlates with a
numerical risk of distant metastases at 10 yrs if
treated with tamoxifen if low RS may avoid
chemotherapy. High RS should get chemotherapy
11Oncotype DX
Multi-gene RT-PCR Assay for Predicting Recurrence
in Node Negative Breast Cancer Patients - NSABP
B-14 Study.
Results
Recurrence Score as a Continuous Predictor
Low RS lt 18 Rec. Rate 6.8 C.I. 4.0 - 9.6
Intermediate RS 18 - 31 Rec. Rate 14.3 C.I.
8.3 - 20.3
High RS ? 31 Rec. Rate 30.5 C.I. 23.6 -
37.4
Paik .S. et al. 26th annual San Antonio breast
cancer symposium 2004.
12Premenopausal Early Breast CancerAdjuvant
Systemic Therapy Decisions
- Chemotherapy
- consider in all Hormone Receptor negative tumours
- (ER negative and PR negative)
- consider in all HER2 positive tumours
- consider in all Node Positive tumours
- Benefit when added (prior) to tamoxifen in
hormone receptor positive tumours
13Premenopausal Early Breast CancerAdjuvant
Chemotherapy
- Adjuvantonline describes 1st, 2nd and 3rd
generation regimens - later generation regimens often more toxic but
more effective (used in patients at higher risk) - 1st generation eg. AC x 4 or CMF x 6
- 2nd generation eg. FEC 100 x 6 or TC x 4
- 3rd generation eg. FEC x 3 ? T x 3 etc
14Adjuvant Chemotherapy vs None in Women lt 50 yrs
- Absolute Difference in Relapse Rates
- at 15 years (EBCTCG Overview data)
- Node Negative Breast Cancer 10
- Node Positive Breast Cancer 13
15Premenopausal Early Breast CancerAdjuvant
Chemotherapy- Late Toxicities
- Premature menopause
- Cardiac toxicity (with anthracyclines, herceptin)
- Leukemia (AC or FEC but not CMF)
- Peripheral Neuropathy (paclitaxel gt docetaxel)
16Premenopausal Early Breast CancerAdjuvant
Hormonal Therapy
- Tamoxifen standard therapy for all ER or PR ve
- Benefit when added to chemotherapy
- 5 years tamoxifen more effective than 2 years.
- ? 10 years better than 5 years in premenopausal
women await publication of ATLAS trial - Women (especially those not tolerating well) need
to know that it makes a big difference
17Benefit from 5 years of Adjuvant Tamoxifen vs
none in ERve Breast Cancer (EBCTCG data)
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20Premenopausal Early Breast CancerAdjuvant
Hormonal Therapy
- Tamoxifen
- Previously used as a fertility treatment
- Women on tamoxifen may not menstruate but still
be fertile - May harm a developing fetus
- Discuss the need for non-hormonal contraception
- Cease pre/post-operatively re risk thrombosis
21Premenopausal Early Breast CancerAdjuvant
Hormonal Therapy
- Aromatase Inhibitors (AI)
- Effectiveness in women lt 45 years who seem
postmenopausal after chemotherapy is uncertain
(unless ovaries removed). BEWARE.. - AI GnRH injections (to suppress ovaries) being
tested in trials eg SOFT and TEXT
22Premenopausal Early Breast CancerAdjuvant
Hormonal Therapy
- GnRH Analogues (eg goserelin zoladex, and
triptorelin) - Given by injection every 4 weeks
- Reversible form of ovarian function suppression
(makes women temporarily postmenopausal) - TGA approved but not PBS reimbursed
- Sometimes used as alternative to chemotherapy
- Benefit after chemotherapy uncertain (SOFT)
23Premenopausal Hormone Receptor Positive Breast
Cancer Adjuvant Therapy
- Chemotherapy effective
- Tamoxifen effective
- Ovarian ablation/suppression effective
- Women lt 35 years worse outcomes if ER or PR ve
- Important Questions Remain
- Are all three treatments required in very young
women? - Are aromatase inhibitors superior to tamoxifen in
premenopausal women if suppress ovarian function?
24SOFT (Suppression of Ovarian Function
Trial) IBCSG 24-02 Premenopausal Trial
Stratification
Treatments
Tamoxifen for 5 years
R A N D O M I S A T I O N
Institution Prior chemotherapy (no/yes) Number
of positive lymph nodes (0 1) Intended method
of OFS (GnRH analogue for 5 yrs oophorectomy
ovarian irradiation)
SURGERY
OFS plus Tamoxifen for 5 years
OFS plus Exemestane for 5 years
25Premenopausal Early Breast CancerAdjuvant
Hormonal Therapy
- Ovarian ablation (oophorectomy) is an effective
adjuvant treatment for hormone receptor positive
tumours - Oophorectomy/ Ovarian suppression tamoxifen
maybe used instead of chemotherapy in node
negative low risk tumours with strongly positive
ER and PR - Salpingo-oophorectomy maybe chosen in BRCA gene
carriers for reducing risk of current ER ve
breast cancer and risk of future new breast and
ovarian cancer
26Premenopausal Early Breast CancerBiologic
Therapy
- Trastuzumab (Herceptin)
- For HER2 positive tumours give concurrently
with taxane chemotherapy and continue for 12
months with heart monitoring every 3 months - Regimens
- AC ?taxane herceptin (15 mths to complete)
- TCH x 6 docetaxel carboplatin herceptin
- (12 mths)
- ? Consider infusaport if 2nd surgery required
27Disease-Free Survival
AC?TH
87
85
AC?T
75
67
N Events AC?T 1679 261 AC?TH 1672 134
HR0.48, 2P3x10-12
Years From Randomization
B31/N9831
28B-31/N9831 Survival
AC?TH
94
91
AC?T
92
87
N Deaths AC?T 1679 92 AC?TH 1672 62
HR0.67, 2P0.015
Years From Randomization
B31/N9831
29Premenopausal Early Breast CancerBiologic
Therapy
- Current Adjuvant Trials for HER2 ve pts
receiving adjuvant chemotherapy - ALTTO compares herceptin, lapatinib or
combination - BETH comparing herceptin/- bevacizumab
(avastin)
30Premenopausal Early Breast CancerBiologic
Therapy
- Bevacizumab (Avastin)
- Currently being tested in adjuvant trials
-
- BETH HER2 positive tumours
-
- BEATRICE Triple Negative tumours ie. ER
negative, PR negative, HER2 negative)
31Premenopausal Early Breast CancerFertility
Considerations
- Chemotherapy may cause menopause or reduced
ovarian reserve - Delaying pregnancy for 5 years of hormonal
therapy will reduce fertility - Fertility after breast cancer treatment is age
and regimen dependent
32Risk of Menopause During the First Year After
Breast Cancer Diagnosis CMF or CEF
Goodwin et al JCO 172365, 1999
33Risk of Menopause After Adjuvant Chemotherapy
- Varies according to chemotherapy regimen
- Classic CMF (6 months) ? 69 become menopausal
- AC x 4 (3 months) ? 34 become menopausal
34STRATEGIES TO PRESERVE FERTILITY
- ovarian protection during chemo
-
- gamete, ovarian tissue and embryo storage prior
to chemotherapy - use of donor oocytes if necessary
35CRYOPRESERVATION
- mature oocytes
- embryos
- ovarian tissue
36AUTOGRAFTINGThe Lancet Oct 2004
- Livebirth after orthotopic transplantation of
cryopreserved ovarian tissue - J Donnez, M M Dolmans, D Demylle, P Jadoul, C
Pirard, J Squifflet, B Martinez-Madrid, A Van
Langendonckt - Lancet 2004 364 1405-10
37SWOG 0230/ IBCSG 34 POEMS Phase III Trial of
Zoladex during Chemotherapy to Reduce Ovarian
Failure after Standard Adjuvant Chemotherapy in
Hormone Receptor Negative Breast Cancer
38STUDY SCHEMA
STRATIFY
Zoladex standard chemo
- lt50 yo
- premenopausal
- Stage I, II, IIIA
- HR negative
- Adjuvant cyclophosphamide containing chemo
planned
- age
- lt40 vs gt40
- chemo type
RANDOMISE
Standard chemo alone
39POEMS (IBCSG 34) Trial Rationale
- No advantage to premature ovarian failure in this
hormone receptor negative subgroup - Disadvantages hot flushes, genitourinary/sexual
dysfunction, mood changes, accelerated
osteoporosis, infertility
40POEMS (IBCSG 34) Trial Rationale
- Suppression of the pituitary-gonadal axis may
help to preserve ovarian follicles and germinal
epithelium from toxic effects of chemotherapy - Several small Phase II studies have examined the
role of GnRH agonists (Zoladex) as gonadal
chemoprotectants - (Blumenfeld 1999, Damewood 1986, Waxman 1987,
Recchia 2002)
41Pregnancy After Early Breast Cancer
- No evidence that it increases risk of recurrence
- Problem of how to treat if relapse occurs during
pregnancy - If cancer relapses later, child likely to
experience death of mother at young age - Relapses can occur between 5-10 years (especially
in hormone receptor positive tumours)
42Early Breast Cancer
- The Good News
- Majority cured with optimal therapy
43The statistics are compelling
Breast Cancer Deaths