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CompletedNCT06363812Updated Feb 28, 2025

Probability of OncotypeDx to Reallocate As Low or High Risk of Recurrence Breast Cancer Patients with Uncertain Biology

An observational study in Breast Cancer, sponsored by Fondazione Sandro Pitigliani. Completed at 1 site in Italy. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-02-28.

Sponsored by Fondazione Sandro Pitigliani · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
258
Ages
18 Years and older
Sex
All
01

Study summary

In some cases of hormone receptor positive, human epidermal growth factor receptor 2 (HER2) negative early breast cancer the benefit of adding adjuvant chemotherapy to hormonal treatment, estimated on the basis of the classical clinico-pathological parameters, is unclear. In these cases the application of a genomic test could be useful in guiding the therapeutic choice.

Read the detailed description

Oncotype Dx (ODx) is a 21-gene assay that classifies primary ER+ breast tumors into three categories of recurrence risk: High (HR), Intermediate (IR) and Low (LR).

Available data show that

  1. patients with ODx low score breast cancer perform well without chemotherapy,
  2. chemotherapy has an additive value to endocrine therapy in patients with ODx high score tumors, and
  3. the role of chemotherapy is unknown in patients with ODx intermediate score cancer.

In this study, the investigators aim to evaluate the capability of ODx to help in guiding the choice of systemic adjuvant treatment in a group of patients with ER+ and HER2- , node negative (pN0) or micrometastatic (pNmi) breast cancer with uncertain biological behavior for whom there is uncertainty about the indication of adjuvant chemotherapy.

02

Conditions studied

  • Breast Cancer

Keywords

  • estrogen receptor positive
  • HER2 negative
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In context

Breast Neoplasms

12,544 studies on the registry are indexed under Breast Neoplasms; 2,892 are open to participants now.

This study's enrollment of 258 is above the median of 184 across 2,642 observational studies indexed under Breast Neoplasms.

Browse Breast Neoplasms studies →

Lead sponsor

Fondazione Sandro Pitigliani is the lead sponsor of 5 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Probability sample

Study population

primary care clinic

Inclusion criteria

  • Histological diagnosis of infiltrating ductal or lobular ER+ HER2- early breast cancer adequately treated with surgery
  • Nodal status: no regional lymph node metastasis (pN0) or micrometastatic regional lymph node (pN1mic)
  • Uncertain biological behavior defined by all of the following parameters: ER >20% and progesterone receptor (PgR) >20% and Ki67 between 14% and 30% and G2
  • Written informed consent

Exclusion criteria

Exclusion Criteria:

  • pathologic tumor stage (pT) > 5 cm (not applicable to the internal control group)
  • Prior neoadjuvant therapy
  • Evidence of metastatic disease
  • No axillary exploration (sentinel lymph node biopsy or axillary dissection)
  • Multifocal or multicentral or bilateral tumors
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Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
258 participants (actual)
Patient registry
No
06

What researchers measure

Primary outcomes

  1. the proportion of tumor samples with a useful OncotypeDx

    number of low risk and high risk at OncotypeDx divided by the total number of tests

    Time frame: 15 days

Secondary outcomes

  1. the proportion of patients in which the result of the test has induced a modification in the initial treatment plan

    number of cases with a therapeutic change divided by the total number of tested cases

    Time frame: 15 days

  2. the proportion of tumor samples with an intermediate risk or not evaluable at OncotypeDx

    number of intermediate risk and not evaluable at OncotypeDx divided by the total number of tests

    Time frame: 15 days

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Study locations

1 site
  • Hospital of Prato
    Prato, 59100, Italy
08

References and documents

Publications

  • Albain KS, Barlow WE, Shak S, Hortobagyi GN, Livingston RB, Yeh IT, Ravdin P, Bugarini R, Baehner FL, Davidson NE, Sledge GW, Winer EP, Hudis C, Ingle JN, Perez EA, Pritchard KI, Shepherd L, Gralow JR, Yoshizawa C, Allred DC, Osborne CK, Hayes DF; Breast Cancer Intergroup of North America. Prognostic and predictive value of the 21-gene recurrence score assay in postmenopausal women with node-positive, oestrogen-receptor-positive breast cancer on chemotherapy: a retrospective analysis of a randomised trial. Lancet Oncol. 2010 Jan;11(1):55-65. doi: 10.1016/S1470-2045(09)70314-6. Epub 2009 Dec 10. PubMed 20005174 ↗
  • Cheang MC, Chia SK, Voduc D, Gao D, Leung S, Snider J, Watson M, Davies S, Bernard PS, Parker JS, Perou CM, Ellis MJ, Nielsen TO. Ki67 index, HER2 status, and prognosis of patients with luminal B breast cancer. J Natl Cancer Inst. 2009 May 20;101(10):736-50. doi: 10.1093/jnci/djp082. Epub 2009 May 12. PubMed 19436038 ↗
  • Dowsett M, Cuzick J, Wale C, Forbes J, Mallon EA, Salter J, Quinn E, Dunbier A, Baum M, Buzdar A, Howell A, Bugarini R, Baehner FL, Shak S. Prediction of risk of distant recurrence using the 21-gene recurrence score in node-negative and node-positive postmenopausal patients with breast cancer treated with anastrozole or tamoxifen: a TransATAC study. J Clin Oncol. 2010 Apr 10;28(11):1829-34. doi: 10.1200/JCO.2009.24.4798. Epub 2010 Mar 8. PubMed 20212256 ↗
  • Early Breast Cancer Trialists' Collaborative Group (EBCTCG). Effects of chemotherapy and hormonal therapy for early breast cancer on recurrence and 15-year survival: an overview of the randomised trials. Lancet. 2005 May 14-20;365(9472):1687-717. doi: 10.1016/S0140-6736(05)66544-0. PubMed 15894097 ↗
  • Harris LN, Ismaila N, McShane LM, Hayes DF. Use of Biomarkers to Guide Decisions on Adjuvant Systemic Therapy for Women With Early-Stage Invasive Breast Cancer: American Society of Clinical Oncology Clinical Practice Guideline Summary. J Oncol Pract. 2016 Apr;12(4):384-9. doi: 10.1200/JOP.2016.010868. Epub 2016 Mar 8. No abstract available. PubMed 26957642 ↗
  • Paik S, Tang G, Shak S, Kim C, Baker J, Kim W, Cronin M, Baehner FL, Watson D, Bryant J, Costantino JP, Geyer CE Jr, Wickerham DL, Wolmark N. Gene expression and benefit of chemotherapy in women with node-negative, estrogen receptor-positive breast cancer. J Clin Oncol. 2006 Aug 10;24(23):3726-34. doi: 10.1200/JCO.2005.04.7985. Epub 2006 May 23. PubMed 16720680 ↗
  • Perou CM, Sorlie T, Eisen MB, van de Rijn M, Jeffrey SS, Rees CA, Pollack JR, Ross DT, Johnsen H, Akslen LA, Fluge O, Pergamenschikov A, Williams C, Zhu SX, Lonning PE, Borresen-Dale AL, Brown PO, Botstein D. Molecular portraits of human breast tumours. Nature. 2000 Aug 17;406(6797):747-52. doi: 10.1038/35021093. PubMed 10963602 ↗

Individual participant data

Plan to share: No

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 28, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT06363812
Lead sponsor
Fondazione Sandro Pitigliani
Collaborators
Genomic Health®, Inc., Istituto Toscano Tumori
Responsible party
Sponsor
First posted
Apr 12, 2024
Start date
Mar 8, 2018
Primary completion
May 15, 2021
Completion
Dec 31, 2024
Last update
Feb 28, 2025

Study contacts

Laura Biganzoli, MD
principal investigator · Hospital of Prato

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Feb 2025. You cannot join it, but the record below documents what was studied.

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