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01-12-2011, 11:57 AM
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#1
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Senior Member
Join Date: Aug 2006
Posts: 3,380
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Chemotherapy Sequence Affects Early Breast Cancer Outcomes
Elsevier Global Medical News. 2011 Jan 7, B Jancin
SAN ANTONIO (EGMN) — The sequence in which paclitaxel and anthracyclines are given for treatment of early breast cancer makes a big difference in long-term outcomes.
That's the conclusion reached in what is believed to be the largest-ever retrospective study of the clinical impact of the sequencing of taxanes and anthracyclines. The study involved 3,010 early breast cancer patients who were treated during 1994-2009 and entered into the prospective online database at the University of Texas M.D. Anderson Cancer Center, Houston.
The clear winner was paclitaxel, followed by anthracycline-based therapy with 5-fluorouracil, doxorubicin (Adriamycin), and cyclophosphamide or 5-fluorouracil, epirubicin, and cyclophosphamide, Dr. Ricardo H. Alvarez reported at the San Antonio Breast Cancer Symposium.
Starting with paclitaxel rather than an anthracycline-first regimen led to better long-term results in the settings of adjuvant chemotherapy and primary systemic (or neoadjuvant) therapy.
The adjuvant chemotherapy analysis included 1,596 women, three-quarters of whom received paclitaxel followed by anthracyclines. The 5-year relapse-free survival rate with this regimen was 88.8%, compared with 79.5% when anthracyclines were followed by paclitaxel. The 10-year relapse-free survival rates were 81.8% and 73.5%, respectively.
Five-year overall survival was 93.1% with paclitaxel followed by anthracyclines, compared with 83.2% for the reverse. The 10-year overall survival rates were 83.9% and 65.6%, respectively.
In a multivariate analysis that was stratified for potential confounders, including age, clinical stage, hormone receptor status, tumor grade, and era of diagnosis, the anthracyclines-first sequence was associated with a 67% increased risk of relapse (P less than .0001) and a 2.5-fold greater risk of mortality (P = .001), according to Dr. Alvarez, a medical oncologist at M.D. Anderson.
Among 1,414 patients who underwent neoadjuvant therapy, the 5-year relapse-free survival rate was 79.0% with the paclitaxel-first regimen vs. 61.2% with the anthracyclines-first regimen. Ten-year relapse-free survival occurred in 61.7% and 50.5%, respectively, of these patients.
Overall survival was 84.2% and 66.2% at 5 and 10 years, respectively, in patients who received paclitaxel followed by anthracyclines, compared with 71.3% and 53.4% in those who got anthracyclines first.
In a multivariate analysis, the anthracyclines-followed-by-paclitaxel sequence of neoadjuvant chemotherapy was associated with an adjusted 49% higher risk of relapse (P = .01) and a nonsignificant 28% increase in risk of all-cause mortality (P = .17), compared with the paclitaxel-first strategy.
The mechanism that accounts for the increased efficacy of taxane-first regimens for treatment of breast cancer is unclear, according to Dr. Alvarez.
He declared having no relevant financial relationships.
Hopeful
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01-12-2011, 01:26 PM
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#2
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Senior Member
Join Date: Feb 2007
Location: Paris, France
Posts: 858
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Re: Chemotherapy Sequence Affects Early Breast Cancer Outcomes
This is crazy. Most of us on this site did it in the wrong sequence. Michka
__________________
08.2006 3 cm IDC Stage 2-3, HER2 3+ ER+90% PR 20%
FEC, Taxol+ Herceptin, Mastectomy, Radiation, Herceptin 1 year followed by Tykerb 1 year,Aromasin /Faslodex
12.2010 Mets to liver,Herceptin+Tykerb
03.2011 Liver resection ER+70% PR-
04.2011 Herceptin+Navelbine+750mg Tykerb
06.2011 Liver ned, Met to sternum. Added Zometa 09.2011 Cyberknife for sternum
11.2011 Pet clear. Stop Navelbine, continuing on Hercpetin+Tykerb+Aromasin
02.2012 Mets to lungs, nodes, liver
04.2012 TDM1, Ned in 07.2012
04.2015 Stop TDM1/Kadcyla, still Ned, liver problems
04.2016 Liver mets. Back on Kadcyla
08.2016 Kadcyla stopped working. mets to liver lungs bones
09.2016 Biopsy to liver. no more HER2, still ER+
09.2016 CMF Afinitor/Aromasin/ Xgeva.Met to eye muscle Cyberknife
01.2017 Gemzar/Carboplatin/ Ibrance/Faslodex then Taxotere
02.2017 30 micro mets to brain breathing getting worse and worse
04.2017 Liquid biopsy/CTC indicates HER2 again. Start Herceptin with Halaven
06.2017 all tumors shrunk 60% . more micro mets to brain (1mm mets) no symptoms
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01-12-2011, 01:33 PM
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#3
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Senior Member
Join Date: Aug 2006
Posts: 3,380
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Re: Chemotherapy Sequence Affects Early Breast Cancer Outcomes
Please note, this is a retrospective study, not a clinical trial - the researchers went looking back through literature and study outcomes to reach this conclusion. There was never a head-to-head trial of one order against the other.
Still, as I am aware the sequence of drugs was antracyclines and then taxanes for most of the members of this site, I thought it should be posted.
Hopeful
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01-12-2011, 05:11 PM
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#4
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Senior Member
Join Date: Sep 2005
Location: Naples FL
Posts: 1,744
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Re: Chemotherapy Sequence Affects Early Breast Cancer Outcomes
My onc told me that when I had chemo in 2005 that the A/C was the first line of attack, now things are approached differently! Hope she is right!!
__________________
Suzan W.
age 54 at diagnosis
5/05 suspicious mammogram-left breast
5/05 biopsy-invasive lobular carcinoma with LCIS,8mm tumor,stage 1 grade 2, ER+ PR+ Her2+++
6/14/05 bilateral mastectomy, node neg. all scans neg.
Oncotype DX-high risk
8/05-10/05 4 rounds A/C
10/05 -10/06 1 yr. herceptin
arimidex-5 years
2/14/08 started daily self administered injections..FORTEO for severe osteoporosis
7/28/09 BRCA 1 negative BRCA2 POSITIVE
8/17/09 prophylactic salpingo-oophorectomy
10/15/10 last FORTEOinjection
RECLAST infusion(ostoeporosis)
6/14/10 5 year cancerversary!
8/2010-18%increase in bone density!
no further treatments
Oncologist says, "Go do the Happy Dance"
I say,"What a long strange trip its been"
'One day at a time'
6-14-2015. 10 YEAR CANCERVERSARY!
7-16 to 9-16. Extensive (and expensive) dental work done to save teeth. Damage from osteoporosis and chemo and long term bisphosphonate use
6-14-16. 11 YEAR CANCERVERSARY!!
7-20-16 Prolia injection for severe osteoporosis
2 days later, massive hive outbreak. This led to an eventual dx of Chronic Ideopathic Urticaria, an auto-immune disease from HELL.
6-14-17 12 YEAR CANCERVERSARY!!
still suffering from CIU. 4 hospitilizations in the past year
as of today, 10-31-17 in remission from CIU and still, CANCER FREE!!!
6-14-18 13 YEAR CANCERVERSARY!! NED!!
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