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Diagnosis of Pathological Complete Response by Vacuum-assisted Biopsy After Neoadjuvant Chemotherapy in Breast Cancer (RESPONDER)

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ClinicalTrials.gov Identifier: NCT02948764
Recruitment Status : Recruiting
First Posted : October 28, 2016
Last Update Posted : March 31, 2017
Sponsor:
Collaborator:
German Research Foundation
Information provided by (Responsible Party):
Jörg Heil, Heidelberg University

Brief Summary:

The main purpose of the study is to evaluate the potential of a minimal invasive, vacuum-assisted biopsy (VAB) to reliably diagnose a pathological complete response (pCR) in the breast after neoadjuvant chemotherapy (NACT) in breast cancer patients.

The study is designed as a multicenter, confirmative, one-armed, intra-individually-controlled, open, diagnostic trial, in which we aim to confirm the applicability of preoperative VAB in patients after NACT. Furthermore, we aspire to quantify the rate of concordant pathological findings (pCR yes / no) in biopsy and surgical specimen.


Condition or disease Intervention/treatment Phase
Breast Neoplasms Device: Vacuum-Assisted Biopsy Not Applicable

Detailed Description:

In clinical routine surgical treatment follows the pre-operative chemotherapy (NACT). However, recent studies have demonstrated that shrinking tumors need less surgical treatment indicating that patients with pCR could potentially be spared of surgery in the future. However, up to now, prediction of pCR after NACT is only moderately accurate. This prospective, monocenter diagnostic trial aims to explore if minimal invasive biopsies (MIB) might overcome this diagnostic challenge.

Ultrasound guided VAB will be performed on 600 breast cancer patients after NACT and directly prior to surgery.

There are only two trial visits that are specific to the trial. All other visits will be routine visits.

  1. The first trial visit will take place in order to provide the patient with detailed information on the study, its' aims, the VAB procedure, and its risks. The patient will be asked to sign a form of informed consent.
  2. At the second trial visit the performance of the VAB (=index test) will take place. This trial visit may vary by patient, tumor, and trial site characteristics and may either be:

    1. An ultrasound guided VAB or
    2. A stereotactically / mammographically guided VAB. All possible VAB procedures and settings (in outpatient clinic, or in operating room directly before the surgery) are equally accepted. We will allow every trial site to choose the adequate setting to the trial site´s and to their patients' needs.

A visit for a follow up will not be necessary in this setting. Possible complications of the VAB procedure may occur while the biopsy is taken.

The pathological results of the VAB specimen will be generally categorized as follows:

  1. Residual tumor cells in VAB specimen (=non-pCR)
  2. No residual tumor cells in the VAB specimen and VAB representative of former tumor region (="pCR in VAB")
  3. No residual tumor cells in the VAB specimen but VAB unclear or not representative of former tumor region (=possible sampling error). These VABs are categorized as uninformative for the primary endpoint of the clinical trial.

The results will be compared to those of the pathological examination of surgical specimen.


Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 600 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: RESPONDER Trial - Diagnosis of Pathological Complete Response by Vacuum-assisted Biopsy After Neoadjuvant Chemotherapy in Breast Cancer
Study Start Date : January 2017
Estimated Primary Completion Date : September 2018
Estimated Study Completion Date : December 2019

Resource links provided by the National Library of Medicine


Arm Intervention/treatment
single-arm study
This project is designed as a one-armed diagnostic study. Every patient included in the study will undergo the same diagnostic test, the vacuum-assisted biopsy, after NACT and before surgery according to guidelines.
Device: Vacuum-Assisted Biopsy

A vacuum-assisted (7-9G), minimal invasive biopsy (VAB), either guided by ultrasound or by mammography (stereotaxis) will be performed once during the second trial visit (after NACT completion and before surgery).

VAB will be performed once, taking at least 5 biopsies (depending on the diameter of the VAB needle) in the (former) tumor region.

Other Name: minimal invasive biopsy




Primary Outcome Measures :
  1. false negative VAB results, reported as the false negative rate (= FNR) [ Time Frame: after breast surgery, up to 6 weeks after VAB ]
    non-detected residual tumor by VAB (=index test) compared to breast surgery (=reference test): FNR = rate of patients with non-detected residual tumor by VAB compared to breast surgery Residual tumor is defined as a positive result; in surgical specimen as well as in VAB.


Secondary Outcome Measures :
  1. negative predictive value (NPV) [ Time Frame: after breast surgery, up to 6 weeks after VAB ]

    The negative predictive value (NPV) will be calculated as the quotient of the number of cases with pCR in VAB and in surgical specimen (= true negative result), divided by the total number of cases with pCR in VAB.

    Residual tumor is defined as a positive result; in surgical specimen as well as in VAB.


  2. positive predictive value (PPV) [ Time Frame: after breast surgery, up to 6 weeks after VAB ]

    The positive predictive value (PPV) will be calculated as the number of biopsies with detected residual tumor cells in VAB and surgery (= true positive results) divided by the number of all cases with residual tumor cells in the VAB.

    Residual tumor is defined as a positive result; in surgical specimen as well as in VAB.


  3. false positive rate (FPR) [ Time Frame: after breast surgery, up to 6 weeks after VAB ]
    FNR = rate of patients with falsely diagnosed residual tumor by VAB compared to breast surgery Residual tumor is defined as a positive result; in surgical specimen as well as in VAB.



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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Female patients with breast cancer after NACT treatment which has been completed according to the NACT protocol.
  • >/=18 years
  • any cT and cN stage
  • any routine breast cancer surgical intervention planned according to guidelines (breast conservation or mastectomy)
  • Residual intramammary target lesion or clip marker is visible in ultrasound and / or mammography
  • Diagnosis of clinical / imaging complete or partial response according to RECIST 1.1 by at least one imaging method (mammography or ultrasound or breast MRI)
  • Inclusion of only one breast per patient
  • In case of multifocal and multicentric disease: confirmation of the same tumorbiological subtype defined by immunohistology in at least 2 lesions.
  • Written informed consent (must be available before enrolment in the trial).

Exclusion Criteria:

  • Premature NACT termination due to progressive disease, massive adverse events or patient wish
  • palliative breast cancer
  • non-detectable intramammary target lesion or clip marker in ultrasound or mammography
  • in case of clip marker = target lesion: dislocation of marker (>5mm distance to the initial lesion border)
  • contraindication for VAB or associated procedures (e.g. local anesthesia)
  • Pregnancy and lactation

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02948764


Contacts
Contact: Joerg Heil, Professor +49 6221 5638555 joerg.heil@med.uni-heidelberg.de
Contact: Michael Golatta, PD michael.golatta@med.uni-heidelberg.de

Locations
Germany
University Breast Unit, Department of Gynecology, University of Heidelberg Recruiting
Heidelberg, Baden-Württemberg, Germany, 69120
Sponsors and Collaborators
Heidelberg University
German Research Foundation
Investigators
Principal Investigator: Joerg Heil, Professor University of Heidelberg University Breast Unit, Department of Gynecology

Publications of Results:
Responsible Party: Jörg Heil, Prof. Dr. Joerg Heil, Heidelberg University
ClinicalTrials.gov Identifier: NCT02948764     History of Changes
Other Study ID Numbers: 2
First Posted: October 28, 2016    Key Record Dates
Last Update Posted: March 31, 2017
Last Verified: March 2017
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes

Keywords provided by Jörg Heil, Heidelberg University:
breast cancer
vacuum-assisted biopsy
pathological complete response

Additional relevant MeSH terms:
Breast Neoplasms
Neoplasms by Site
Neoplasms
Breast Diseases
Skin Diseases