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Survival OutcomesSASI-MBCNCT07586319

Effectiveness of Surgery for Improving Survival in Oligometastatic Breast Cancer Patients

A study testing surgery in accordance with current clinical guidelines and modified radical mastectomy or breast conservation surgery in people with Survival Outcomes, run by Sharif Medical Research Center at 1 site in Pakistan.

Enrolling by invitation

Enrolling by invitation. The study team selects and invites participants, usually from an existing group of patients.

Sites and contacts
Official record
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Trial summary

Breast cancer is the most common malignancy in women, with stage IV disease at diagnosis in 5-10% of cases. Oligometastatic breast cancer (OMBC), defined as limited metastases (≤3-5 in ≤1-2 organs), may have better outcomes. Read more about this study

Who is it for?
Ages 18 years and older, women only
Conditions the study is for
Survival Outcomes
What is being tested?
surgery in accordance with current clinical guidelines and modified radical mastectomy or breast conservation surgery
Type of treatment
Surgery or procedure
Could I receive a placebo?
No, everyone receives an active treatment
How many people
110 participants
Where
1 sitePakistan
Study dates
1 Jun 2026to 1 Jun 2031
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • Women only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age ≥18 years
  • Histologically confirmed breast carcinoma
  • Oligometastatic disease (≤5 lesions, less than 3 organs)
  • ECOG performance status 0-2
  • Eligible for systemic therapy and surgery
  • Informed consent obtained

Who cannot join

  • Unfit for surgery
  • Prior locoregional surgery on primary tumor
  • Visceral crisis

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Pakistan1 site
  • Department of Surgery and Surgical Oncology

    Lahore, Punjab Province, 54910

Other trials in Pakistan

About this study

Official title: Effectiveness of Primary Tumour Surgery in Oligometastatic Breast Cancer for Improving Overall Survival: A Quasi-Experimental Study

Breast cancer is the most common malignancy in women, with stage IV disease at diagnosis in 5-10% of cases. Oligometastatic breast cancer (OMBC), defined as limited metastases (≤3-5 in ≤1-2 organs), may have better outcomes. Systemic therapy is the cornerstone of treatment, while the role of surgery or radiotherapy for the primary tumour remains controversial. Current European Society for Medical Oncology(ESMO )and National Comprehensive Cancer Network(NCCN) guidelines advise systemic therapy as standard, reserving surgery mainly for palliation of local disease. Few Retrospective studies offering primary tumour surgery to oligometastatic breast cancer responding to systemic therapy suggest survival benefit, but several randomised trials to date showed inconsistent results. In Pakistan, data regarding survival pattern after breast surgery in oligometastatic breast cancer are scanty and this study would bridge this knowledge gap.

Read the detailed description

Oligometastatic breast cancer (OMBC) is an entity is metastatic breast cancer with limited tumour burden. Usual nomenclature suggests total number of metastases to be less than 5 in up to 3 organs. It is considered an intermediate stage between localised and metastatic breast cancer. As compared to Multi metastatic stage 4 breast cancer oligometastatic breast cancer may have a favourable outcome (1,3) Currently the standard treatment for OMBC is systemic therapy (chemotherapy, hormone therapy or immunotherapy), with surgery or radiotherapy to primary tumour and metastatic sites as palliation only, as per ESMO and NCCN guidelines. (4,5) Retrospective observational studies suggested a possible survival benefit with primary tumour surgery (6,7). On the other hand, several Randomised controlled trials (Badwe et al., MF07-01, ECOG-ACRIN E2108, ABCSG-28) have shown inconsistent overall survival benefit with surgery in de novo metastatic breast cancer (8-10). The survival benefit has been observed where primary tumor surgery was performed in patients who respond well to systemic therapy in the form of complete or partial radiological response of metastasis, especially in patients with low metastatic burden, bone-only disease, or favorable biology may have differential outcomes after surgery (9,11).

Existing evidence is conflicting. So, case to case-based decision is being made for the oligometastatic breast cancer patients. There is a knowledge gap specific to oligometastatic disease among Pakistani patients as well. There are few Pakistani studies on this research question (12) The objective of this study is to determine whether surgical resection of the primary tumour in addition to standard systemic therapy improves overall survival compared with systemic therapy alone in patients with oligometastatic breast cancer.

Being tested
surgery in accordance with current clinical guidelines, modified radical mastectomy or breast conservation surgery
Keywords
oligometastatic, breast cancer,survival,role of surgery
Medical subject headings
Breast Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • surgery in accordance with current clinical guidelinesProcedure or surgery

    MRM or BCS

  • modified radical mastectomy or breast conservation surgeryProcedure or surgery

    patients who receive systemic therapy and respond to treatment will undergo modified radical mastectomy or breast conservation surgery

Study groups in NCT07586319
Study groupRoleWhat they receive
breast surgery intervention groupExperimentalbreast cancer patients with metastasis who receive standard systemic therapy and have complete or partial radio logical response to metastatic deposits will be offered modified radical mastectomy or Breast conservation surgery in intervention group patients
Receives: Procedure: surgery in accordance with current clinical guidelines; Procedure: modified radical mastectomy or breast conservation surgery
systemic therapy aloneNo interventionbreast cancer patients with oligometastasis receiving standard systemic chemo therapy ,hormone therapy or immunotherapy

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Overall survival

    Primary outcome measure of study will be overall survival in oligometastatic breast cancer patients after surgical intervention with chemotherapy versus chemotherapy alone. The time from intervention to the time of end point (death of patient) will be measured using this data through Kaplan Meier survival curve and using Cox regression model. We shall calculate:

    • Median survival
    • 3-year survival rate
    • Disease specific survival
    • Progression free Survival (PFS): Time from intervention to the progression will be measured using Kaplan-Meier survival method. End point of follow-up will be worsening of lesion, or appearance of new lesion, or death. We shall use RECIST criteria to record tumor change
    • Survival rate Total number of patients given intervention plus chemotherapy versus chemotherapy alone as denominator and total number of patients survived during follow-up time as numerator. Hazard Ratio will compare the risk of dying among intervention compared to control group.

    Measured: 3 years

Secondary outcomes (1)
  1. 1. Quality of life of breast cancer patients after intervention versus usual care(chemotherapy)

    QUALITY of life will be measured using EORTIC QUALITY OF LIFE QUESTIONNAIRE -BR 42 (QOL-42) Baseline quality of life of participants and the change in quality of life after intervention will be recorded. Patients will be interviewed after 3-months,6-months and then yearly. This tool assesses functional and symptom level domains on the scale of 0 to 100(better function=close to100; worse symptoms=close to100). Each item is scored from 1 to 4 (1 = not at all, 2= a little,3= quite a bit,4= very much).

    Measured: 3 years

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted14 May 2026
  2. Study start1 Jun 2026 (estimated)
  3. Primary completion1 Jun 2028 (estimated)
  4. Study completion1 Jun 2031 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
110 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07586319
Sponsor's protocol ID
SMDC/SMRC/409-26
Other IDs
SharifMRC
Acronym
SASI-MBC
Status last verified
May 2026
First submitted
23 Apr 2026
Last updated
19 May 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: results of surgical intervention as overall and progression free survival.quality of life proforma results,patients demographics, treatment given

Publications

  • Ma L, Mi Y, Cui S, Wang H, Fu P, Yin Y, Jin F, Li J, Liu Y, Fan Z, Zhang H, Geng C, Jiang Z. Role of locoregional surgery in patients with de novo stage IV breast cancer: analysis of real-world data from China. Sci Rep. 2020 Oct 22;10(1):18132. doi: 10.1038/s41598-020-75119-0.

    PubMed 33093581
  • Wu C, Li X, Liu S, Yao L, He T, Wang Y, Dong H, Niu S, Wang M, Xu Y. Primary tumor resection in de novo metastatic breast cancer from an oligometastatic perspective: A systematic review and meta-analysis. iScience. 2024 Oct 31;27(12):111224. doi: 10.1016/j.isci.2024.111224. eCollection 2024 Dec 20.

    PubMed 39618499
  • Badwe R, Hawaldar R, Nair N, Kaushik R, Parmar V, Siddique S, Budrukkar A, Mittra I, Gupta S. Locoregional treatment versus no treatment of the primary tumour in metastatic breast cancer: an open-label randomised controlled trial. Lancet Oncol. 2015 Oct;16(13):1380-8. doi: 10.1016/S1470-2045(15)00135-7. Epub 2015 Sep 9.

    PubMed 26363985
  • Pons-Tostivint E, Alouani E, Kirova Y, Dalenc F, Vaysse C. Is there a role for locoregional treatment of the primary tumor in de novo metastatic breast cancer in the era of tailored therapies?: Evidences, unresolved questions and a practical algorithm. Crit Rev Oncol Hematol. 2021 Jan;157:103146. doi: 10.1016/j.critrevonc.2020.103146. Epub 2020 Nov 12.

    PubMed 33227574
  • Gennari A, Andre F, Barrios CH, Cortes J, de Azambuja E, DeMichele A, Dent R, Fenlon D, Gligorov J, Hurvitz SA, Im SA, Krug D, Kunz WG, Loi S, Penault-Llorca F, Ricke J, Robson M, Rugo HS, Saura C, Schmid P, Singer CF, Spanic T, Tolaney SM, Turner NC, Curigliano G, Loibl S, Paluch-Shimon S, Harbeck N; ESMO Guidelines Committee. Electronic address: clinicalguidelines@esmo.org. ESMO Clinical Practice Guideline for the diagnosis, staging and treatment of patients with metastatic breast cancer. Ann Oncol. 2021 Dec;32(12):1475-1495. doi: 10.1016/j.annonc.2021.09.019. Epub 2021 Oct 19. No abstract available.

    PubMed 34678411
  • Ren C, Sun J, Kong L, Wang H. Breast surgery for patients with de novo metastatic breast cancer: A meta-analysis of randomized controlled trials. Eur J Surg Oncol. 2024 Jan;50(1):107308. doi: 10.1016/j.ejso.2023.107308. Epub 2023 Dec 1.

    PubMed 38048724
  • van Ommen-Nijhof A, Steenbruggen TG, Capel L, Vergouwen M, Vrancken Peeters MT, Wiersma TG, Sonke GS. Survival and prognostic factors in oligometastatic breast cancer. Breast. 2023 Feb;67:14-20. doi: 10.1016/j.breast.2022.12.007. Epub 2022 Dec 14.

    PubMed 36549169
  • Chen EL, Heiling H, Li T, Bellon JR, Nakhlis F, Parsons HA, Martin A, Burstein HJ, Tolaney SM, Snow C, Tayob N, Braunstein LZ, Lin NU, Sammons S. Outcomes of patients with de novo oligometastatic breast cancer treated with curative intent at a single institution. Breast Cancer Res Treat. 2026 Jan 8;215(2):55. doi: 10.1007/s10549-025-07889-y.

    PubMed 41501299

Questions about this trial

What is this clinical trial studying?

A study testing surgery in accordance with current clinical guidelines and modified radical mastectomy or breast conservation surgery in people with Survival Outcomes, run by Sharif Medical Research Center at 1 site in Pakistan.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: enrolling by invitation, as of the sponsor's last update on 19 May 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Pakistan. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Overall survival (time frame: 3 years). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT07586319, which also lists 8 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 19 May 2026; AzTrials last refreshed its copy on 8 Nov 2026.

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