Clinical trial NCT02209857: The Symphony Triple A Study: Using Symphony in Treatment Decisions Concerning Adjuvant Systemic Therapy
Official title: The Symphony Triple A Study: Using Symphony as an Adjunct to Histopathologic Parameters When the Doctor is Ambivalent About the Administration and Type of Adjunctive Systemic Therapy
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Breastcancer
Invasive Breast Carcinoma by Gene Expression Profile
Keywords: Breastcancer
Adjuvant chemotherapy
70-gene expression profile
MammaPrint
Lead sponsor: Diakonessenhuis, Utrecht
Sponsor class: OTHER
Collaborators: name: Agendia
First posted: 2014-08-06
Enrollment: 660
Sex: FEMALE
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: CASE_CONTROL
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: The study population is the CBO 2012 guideline defined group of hormone receptor positive, invasive ductal breast cancer patients when there is doubt about the indication for adjuvant chemotherapy based on traditional prognostic factors. Patients are included and MammaPrint® is determined after complete histological assessment following definitive surgery. The following pathology items have to be recorded: tumour size, grade, ER- and PR- receptor status, Her-2 neu status, and lymph node status. No difference is made in ethnical background or past medical history other than cancer.

Brief summary: Rationale:

Prediction of prognosis in patients with breast cancer is important to determine the indication for adjuvant chemo-, endocrine- and immunotherapy. Apart from the clinicopathological parameters incorporated into the Adjuvant!Online predictive model, the validated 70-gene signature MammaPrint® is predictive of outcome too. MammaPrint® is advised in the current Dutch CBO guideline (2012) for hormone receptor positive, invasive ductal breast cancer in individual cases when there is 'doubt' about the indication for adjuvant chemotherapy based on traditional prognostic factors. In the present study MammaPrint® is used in this CBO 2012 guideline defined group of patients as an additional test for decision-making for adjuvant chemotherapy.

Objective:

To assess the impact of MammaPrint® on clinical decision making regarding the administration of adjuvant chemotherapy in the CBO 2012 guideline defined group of hormone receptor positive invasive ductal carcinoma patients when there is doubt about the indication for adjuvant chemotherapy based on traditional prognostic factors. The influence of various factors and the impact of MammaPrint® in predefined subgroups will be analyzed too. Data from a national registry regarding adjuvant systemic treatment in patients with similar clinicopathological characteristics in whom MammaPrint® was not used will be obtained to provide a control group.

Hypothesis:

In the group of patients where national guidelines advocate using systemic therapy but doctors are ambivalent in treating patients with adjuvant chemotherapy, it is hypothesized that using MammaPrint® as an additional test will change the indication for adjuvant therapy in a substantial proportion of patients resulting in at least 10% less patients who receive adjuvant chemotherapy. Thus, in the study group at least 10% less patients will receive chemotherapy when compared to a contemporary group of patients with similar clinicopathological characteristics but without using MammaPrint®

Study population:

Hormone receptor positive, invasive ductal breast cancer patients when there is doubt about the indication for adjuvant chemotherapy based on traditional prognostic factors.

Study design:

This is a prospective multicentre impact study.

Detailed description: 1. INTRODUCTION AND SCOPE During the last decade treatment guidelines for the administration of adjuvant chemotherapy in patients with breast cancer have changed, today advising chemotherapy in the majority of patients having a \>1cm invasive cancer. Prognostic factors used to determine the need for adjuvant chemotherapy are axillary lymph node status, tumour size and grade, patients' age, and HER2 over expression. In addition, HER2 status and ER/PR are also predictive of the effect of particular adjuvant systemic therapies.

   Besides predictive models based on histopathologic factors, gene expression arrays have recognized four different molecular subtypes of breast cancer (Luminal A, Luminal B HER2 +, Luminal B HER2 - and Triple negative). In addition, a number of gene expression profiles have been designed and validated in its capacity to predict the risk of dissemination. One of the gene expression profiles is the 70-gene MammaPrint® signature. The 70-gene MammaPrint® has been validated in different retrospective studies, and in a prospective community-based feasibility study (RASTER). A considerable discrepancy in risk estimations among different clinicopathologic guidelines and MammaPrint was observed. In the RASTER study, addition of MammaPrint to standard clinic-pathological factors led to a change in adjuvant systemic treatment advice in 19% of patients. The 5-year metastases free survival rates for MammaPrint Low Risk (n=219) and High Risk (n=208) patients were 97,0% and 91,7%.

   The recent Dutch CBO guideline (2012) for breast cancer suggests using validated gene expression profiles in individual cases in patients with an invasive ductal carcinoma with positive hormonal receptor when there is doubt about the indication for adjuvant chemotherapy based on the traditional prognostic factors.
2. OBJECTIVES Primary objectives Assess the impact of MammaPrint® on clinical decision making regarding the administration of adjuvant chemotherapy in the CBO 2012 guideline defined group of hormone receptor positive invasive ductal carcinoma patients when there is doubt about the indication for adjuvant chemotherapy based on traditional prognostic factors.

   Secondary objectives
   * To document the influence of primary tumour characteristics (size, Bloom and malignancy grade and Her-2 status) and N-status (N0 vs N1mi) with respect to the (Mammaprint-dependent) decision to give adjuvant chemotherapy in predefined subgroups
   * To address doctor and patient influence on the eventual decision to give adjuvant chemotherapy.

   Hypothesis In the group of patients where contemporary national guidelines advocate using systemic therapy but doctors are ambivalent in treating patients with adjuvant chemotherapy, it is hypothesized that using MammaPrint® as an additional test will change the indication for adjuvant therapy in a substantial proportion of patients resulting in at least 10% less patients who receive adjuvant chemotherapy. Thus, in the study group at least 10% less patients will receive chemotherapy when compared to a contemporary group of patients with similar clinicopathological characteristics but without using MammaPrint®
3. STUDY POPULATION

   Population (base) The study population is the CBO 2012 guideline defined group of hormone receptor positive, invasive ductal breast cancer patients when there is doubt about the indication for adjuvant chemotherapy based on traditional prognostic factors.

   Doubt about the indication for adjuvant chemotherapy based on traditional prognostic factors is an ill-defined criterion. Potential differences in the individual judgement of medical oncologists deciding on adjuvant systemic therapy are conceivable, which will translate in differences in the tendency to use MammaPrint®. Based on the CBO-guideline 2012, we expect that the tendency to use MammaPrint® in small, low-grade tumours as well as in patients with lymph node macrometastases will be relatively low.

   Based on the aforementioned assumptions the expected proportional composition of the study group 'of hormone receptor positive, invasive ductal breast cancer patients when there is doubt about the indication for adjuvant chemotherapy based on traditional prognostic factors' is as follows:

   N0, BR 1, \> 2 cm : 10-15% (60-90 patients) N0, BR 2, \> 1 cm : 50-60% (300-350 patients) N1mi, grade 1,2 : 15-20% (90-120 patients)

   Her+, N0, \<2c, grade I: \<5% (\<30 patients) NI: \<5% (\<30 patients) N0, BR 1, 1-2 cm: \<5% (\<30 patients)

   Control group

   For comparison, data regarding adjuvant chemotherapy in patients in whom no MammaPrint® was used will be obtained from a national registry Netherlands Cancer Registry (NKR) and matched with the MammaPrint® group to date of diagnosis and clinicopathological characteristics. The control group will enable analysis of the impact of Mammaprint on the proportion of patients receiving adjuvant chemotherapy.
4. STUDY DESIGN

This is a prospective multicentre impact study of MammaPrint® on clinical decision making in a predefined group of patients where doctors and patients are ambivalent about adjuvant chemotherapy. MammaPrint® is offered in addition to standard histopathology tests for decision-making regarding adjuvant systemic therapy. The advised adjuvant systemic therapy will be recorded before and after disclosure of the MammaPrint® result.

Logistical planning:

Post-surgery:

1. Every patient is discussed in a multidisciplinary team meeting for further treatment advice. After definitive pathological assessment of tumour size, Bloom and Richardson grade, confirmation of ER/PR- and HER2 status, potential inclusion of a patient is assessed.
2. In the surgical outpatient clinic, patients are seen postoperatively and the histopathological results are discussed. The surgeon informs the patient about the conclusion of the multidisciplinary team and the patient is informed about existing uncertainty of adjuvant treatment and the added value of the MammaPrint. Study information is supplied including an Informed Consent form.
3. The pathologist sends the MammaPrint kit to Agendia for analyses. The attending surgeon and/or research nurse register patients by completing electronic Case Report Form (CRF) 1.
4. MammaPrint® result is emailed to the surgeon, medical oncologist and mammacare nurse within 10 working days.
5. Within two weeks the patient is seen in the outpatient clinic by the oncologist to discuss the result of the MammaPrint®. A final decision concerning adjuvant chemotherapy is made with the patient. CRF 2 is completed by the oncologist.

The study is expected to enrol 600 patients in approximately 25 hospitals in two and a half years. The follow up regarding the advice of adjuvant treatment is estimated to be two months, just after the start of the adjuvant chemotherapy.

5. TISSUE COLLECTION AND 'CLASSIC' HISTOPATHOLOGICAL EXAMINATION

After patients' approval and signed consent forms, samples can be sent to Agendia for MammaPrint® analysis. The tissue specimen for MammaPrint® analysis consists of a tumour block or 10 unstained slides with 5µm section on each slide. The tissue can be shipped as formalin fixed paraffin embedded (FFPE) tissue.

6. STATISTICAL ANALYSIS

Descriptive statistics The primary endpoint is defined as the group of patients who receive adjuvant systemic therapy and will be compared to the proportion of patients who were advised to receive chemotherapy before knowledge of the MammaPrint® result. In addition, using NKR/NBCA data as controls, the absolute difference in the proportion of patients receiving adjuvant chemotherapy is evaluated. This absolute difference is evaluated for the whole group as well as for the three expectedly largest subgroups.

Statistical analysis Baseline characteristics will be summarized by an incidence table. The frequency of chemotherapy + endocrine versus endocrine alone decisions will be addressed before and after receiving the MammaPrint result in the study group. A McNemars test will be performed for the comparison of the two proportions treated (before and after), both expressed as a percentage. When the p- value for this McNemars test is less than 0.05, the conclusion will be that the two proportions indeed differ significantly.

Chi-square tests (binary variables), non-parametric Mann-Whitney test (for continuous variables - 2 groups) and non-parametric Kruskall-Wallis tests (continuous variables - more groups) will be used for the comparison of population characteristics in different subgroups. When the p- values are less than 0.05, the conclusion will be that there is a significant difference between the subgroups for these variables.

The percentage treatment change will be calculated for the whole study group and for the three predefined subgroups. The distribution of MammaPrint test results will be summarized in a frequency table. With a predefined sample size for the whole group (n=600), and a control group consisting of at least 1800 patients the minimal detectable difference in the proportion of patients receiving chemotherapy is 6.6% for the whole group and 9.3% for a subgroup of 300 patients (2-sided alpha 0.05, Power 80). After inclusion of the first 150 patients, additional sample size calculation will be conducted based on the actual proportions of the subgroups.

7. ETHICAL CONSIDERATIONS

Regulation statement This study is conducted according to the principles of the Declaration of Helsinki (version 6, February 2008) and in accordance with the Medical Research Involving Human Subjects Act (WMO) and other legal and regulatory frameworks.

Eligibility criteria: Inclusion criteria

* Oestrogen receptor positive, invasive ductal and female breast cancer patients where the benefit of adjuvant chemotherapy is uncertain based on traditional prognostic factors
* Written informed consent
* Patients with multicentric or contralateral disease

Exclusion criteria

* Patients with a previous history of malignancy (in the five years before breast cancer diagnosis), excluding basal cell carcinoma.
* Patients with confirmed distant metastasis.
* Patients who undergo neoadjuvant systemic treatment.

Primary outcomes:
measure: Frequency of adjuvant chemotherapy
timeFrame: Within one month after surgery
Secondary outcomes:
measure: Changes in adjuvant systemic treatment decisions due to MammaPrint use
timeFrame: Within one month after (initial) surgery
measure: Influence of BluePrint and TargetPrint on adjuvant systemic treatment decisions
timeFrame: Within one month after (initial) surgery
measure: Clinical utility of MammaPrint in multicentric/contralateral disease.
timeFrame: Within one month after (initial) surgery
measure: Concordance of TargetPrint results with locally assessed ICH/FISH ER, PR and Her2 results
timeFrame: Within one month after (initial) surgery
measure: Comparison of clinical subtype with BluePrint molecular subtype
timeFrame: Within one month after (initial) surgery
Other outcomes:
Locations:
city: Den Bosch
country: Netherlands
facility: Jeroen Bosch ziekenhuis
state: Brabant
city: Assen
country: Netherlands
facility: Whilhelmina ziekenhuis
state: Drenthe
city: Lelystad
country: Netherlands
facility: Medisch Centrum Zuiderzee
state: Flevoland
city: Drachten
country: Netherlands
facility: Nij Smellinghe ziekenhuis
state: Friesland
city: Heerenveen
country: Netherlands
facility: Tjongerschans
state: Friesland
city: Sneek
country: Netherlands
facility: Antoniusziekenhuis
state: Friesland
city: Apeldoorn
country: Netherlands
facility: Gelre ziekenhuis
state: Gelderland
city: Arnhem
country: Netherlands
facility: Rijnstate
state: Gelderland
city: Ede
country: Netherlands
facility: Gederse Vallei
state: Gelderland
city: Harderwijk
country: Netherlands
facility: Sint Jansdal
state: Gelderland
city: Tiel
country: Netherlands
facility: Ziekenhuis Rivierenland
state: Gelderland
city: Zutphen
country: Netherlands
facility: Gelre ziekenhuis
state: Gelderland
city: Alkmaar
country: Netherlands
facility: Medisch Centrum Alkmaar
state: Noord-Holland
city: Amsterdam
country: Netherlands
facility: Boven IJ ziekenhuis
state: Noord-Holland
city: Amsterdam
country: Netherlands
facility: Onze Lieve Vrouwe Gasthuis
state: Noord-Holland
city: Den Helder
country: Netherlands
facility: Gemini ziekenhuis
state: Noord-Holland
city: Haarlem
country: Netherlands
facility: Kennemer Gasthuis
state: Noord-Holland
city: Hoofddorp
country: Netherlands
facility: Spaarne ziekenhuis
state: Noord-Holland
city: Hoorn
country: Netherlands
facility: Westfriesgasthuis
state: Noord-Holland
city: Purmerend
country: Netherlands
facility: Waterland ziekenhuis
state: Noord-Holland
city: Schiedam
country: Netherlands
facility: Vlietland ziekenhuis
state: Noord-Holland
city: Zaandam
country: Netherlands
facility: Zaans medisch centrum
state: Noord-Holland
city: Deventer
country: Netherlands
facility: Deventer ziekenhuis
state: Overijssel
city: Hardenberg
country: Netherlands
facility: Ropcke Zweers ziekenhuis
state: Overijssel
city: Zwolle
country: Netherlands
facility: Isale klinieken
state: Overijssel
city: Bilthoven
country: Netherlands
facility: Alexander Monro ziekenhuis
state: Utrecht
city: Hilversum
country: Netherlands
facility: Ter Gooi ziekenhuis
state: Utrecht
city: Nieuwegein
country: Netherlands
facility: Sint Antoniusziekenhuis
state: Utrecht
city: Woerden
country: Netherlands
facility: Zuwe Hofpoort ziekenhuis
state: Utrecht
city: Capelle aan den IJssel
country: Netherlands
facility: IJsselland ziekenhuis
state: Zuid-Holland
city: Rotterdam
country: Netherlands
facility: Sint Fransiscus gasthuis
state: Zuid-Holland
city: Zoetermeer
country: Netherlands
facility: Lange Land ziekenhuis
state: Zuid-Holland
city: Groningen
country: Netherlands
facility: Martini ziekenhuis
city: Utrecht
country: Netherlands
facility: Diakonessenziekenhuis
Study officials:
affiliation: Diakonessenhuis Utrecht, The Netherlands
name: Thijs van Dalen, Dr
role: PRINCIPAL_INVESTIGATOR
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