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Breast CancerDELTINCT07757074

A Comparative Study of Delayed Endoscopic DTI and Latissimus Dorsi ±Impalnt Reconstruction Post-Mastectomy

An observational study of Breast Cancer, run by Du Zhenggui at 1 site in China.

Not yet recruiting

Opening soon. The study is approved but enrolment has not started yet. Sites may already take enquiries.

Sites and contacts
Official record
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Trial summary

Breast cancer is the most common malignancy in women. In 2022, China saw about 357,200 new cases and 75,000 deaths, accounting for 15.59% and 7.94% of all new cancer cases and cancer-related deaths, respectively. Read more about this study

Who is it for?
Ages 18 to 70 years, women only
Conditions the study is for
Breast Cancer
What is being tested?
Surgery options
Type of treatment
Surgery or procedure
How many people
268 participants
Where
1 siteChina
Study dates
1 Sep 2026to 30 Sep 2028
Phase
Observational
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 to 70 years
  • Women only
  • No healthy volunteers
  • Adult, Older adult

Study population: Collecting the data of breast cancer patients who visited our hospital and the cooperative units from 2026 to 2027.

Who may be able to join

  • Female patients aged 18 - 70 years (inclusive) who have undergone simple mastectomy for breast cancer;
  • Patients with good local flap viability and laxity one year after total mastectomy or six months after completion of radiotherapy;
  • Patients who are able and willing to sign the informed consent form.

Who cannot join

  • Recurrence detected on follow-up (based on clinical, imaging, or pathological findings), including local/regional recurrence or uncontrollable distant metastasis;
  • Patients who had the pectoralis major muscle resected during the initial mastectomy;
  • History of thoracic or back surgery with suspected damage to the thoracodorsal vessels;
  • Poor general condition and inability to tolerate surgery;
  • Presence of severe comorbidities, such as uncontrolled diabetes, severe bone marrow suppression after breast cancer treatment, compromised immune function, or a history of long-term smoking;
  • Participation in other clinical studies that may interfere with this trial.

Trial locations and contacts

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

China1 site
  • West China hospital of Sichuan University

    Chengdu, Sichuan, 610000

    Zhenggui Du, +86 13880768222, docduzg@163.com

Other trials in China

About this study

Official title: A National Multicenter, Prospective Cohort Study on Delayed Endoscopic Direct-to-Implant Breast Reconstruction Via Transaxillary Approach Versus Latissimus Dorsi ± Implant Breast Reconstruction Following Mastectomy

Breast cancer is the most common malignancy in women. In 2022, China saw about 357,200 new cases and 75,000 deaths, accounting for 15.59% and 7.94% of all new cancer cases and cancer-related deaths, respectively. Factors like physician skills, patient attitudes, economics, and tumor-related issues have led to a breast-conserving rate of about 19.5% nationwide, and less than 10% in non-first-tier cities. The immediate breast reconstruction rate after mastectomy is around 10.7%, with over 70% of patients losing their breasts during initial surgery. These patients often face long-term suboptimal psychological health post-surgery. As treatment outcomes improve, more patients are seeking delayed breast reconstruction.

Breast reconstruction after simple mastectomy faces challenges due to insufficient skin and tissue volume. Traditional methods include: (1) A two - stage procedure with a tissue expander in the first stage and prosthesis replacement in the second stage. This approach increases costs, requires two surgeries and anesthetics, and carries higher risks of incision dehiscence, prosthesis exposure, infection, and surgical failure. (2) Autologous reconstruction using the latissimus dorsi muscle flap, which involves simultaneous surgery on donor and recipient sites. This method results in significant trauma, longer operating times, higher complication risks, compromised sensation and function, large scars, and potential shoulder - related issues. Due to limited tissue volume, a prosthesis is often needed. While autologous reconstruction offers better breast satisfaction and social psychological health, its complexity and costs limit patient acceptance.

To tackle these challenges, our team has developed a minimally invasive, two - stage endoscopic breast reconstruction technique via an axillary approach with an inflation method. This approach reduces surgical time, trauma, and costs, minimizes complications, and enables faster recovery. The tension - free axillary incision eliminates the risk of dehiscence. Skin expansion through the prosthesis cavity results in a more natural - looking and softer breast. No studies have compared this technique with latissimus dorsi ± prosthesis reconstruction after simple mastectomy. We propose a prospective cohort study to evaluate its safety and feasibility, aiming to offer a more cost - effective, simple, and efficient reconstruction option to improve patients' quality of life.

Read the detailed description

This study is a multicenter, open, prospective cohort study. Inclusion criteria: (1) Female patients aged 18 - 70 years (inclusive) who have undergone simple mastectomy for breast cancer; (2) Patients with good local flap viability and laxity one year after total mastectomy or six months after completion of radiotherapy; (3) Patients who are able and willing to sign the informed consent form.

Exclusion criteria: (1) Recurrence detected on follow-up (based on clinical, imaging, or pathological findings), including local/regional recurrence or uncontrollable distant metastasis; (2) Patients who had the pectoralis major muscle resected during the initial mastectomy; (3) History of thoracic or back surgery with suspected damage to the thoracodorsal vessels; (4) Poor general condition and inability to tolerate surgery; (5) Presence of severe comorbidities, such as uncontrolled diabetes, severe bone marrow suppression after breast cancer treatment, compromised immune function, or a history of long-term smoking; (6) Participation in other clinical studies that may interfere with this trial.

Prior to group allocation, investigators at each research center will first stratify the subjects by radiotherapy. The subjects will be divided into two groups based on whether they have received radiotherapy, with the sample size ratio of the radiotherapy group to the non-radiotherapy group being 1:2. Subsequently, the subjects will be assigned to the two-stage endoscopic immediate prosthesis breast reconstruction group (with a proportion of "3") and the latissimus dorsi±prosthesis breast reconstruction group (with a proportion of "1"). The target sample size is 268 participants, comprising 89 in the radiotherapy group (67 in the two-stage endoscopic immediate prosthesis breast reconstruction group, 22 in the latissimus dorsi±prosthesis breast reconstruction group) and 179 in the non-radiotherapy group (134 in the two-stage endoscopic immediate prosthesis breast reconstruction group, 45 in the latissimus dorsi±prosthesis breast reconstruction group).

Collecting data includes encompassing demographics (e.g., age, BMI, breast ptosis), medical history (e.g., comorbidities, prior surgeries, family cancer history), oncological profiles (e.g., tumor type, size, location, stage, immunohistochemistry, nodal status, neoadjuvant/adjuvant therapies), and surgical details (e.g., procedure type, operative time, intraoperative blood loss, margin status, gland resection weight, implant size, drainage placement) from preoperatively to postoperatively. Postoperative follow-ups at 1 month, 6 months, 1 year will document complications, cosmesis (BREAST-Q, SCAR-Q, QLQ-BR45, Harris and Ueda assessments). Complications are recorded per patient, with events classified as major, minor, or any using the Clavien-Dindo grading system (Grades I-II: minor; III-IV: major). BREAST-Q/SCAR-Q/QLQ-BR45 questionnaires will be completed preoperatively and at 6 months/12 months postoperatively, alongside Harris and Ueda assessments and standardized breast photography (anteroposterior, lateral, oblique views).

An interim analysis will occur 1 year after study initiation and 1 month post-enrollment completion. Final analysis follows 1-year postoperative follow-up for all participants. Categorical variables will be analyzed using chi-square or Fisher's exact tests; continuous variables via t-tests, ANOVA, or non-parametric alternatives (Mann-Whitney/Kruskal-Wallis) as appropriate. Survival outcomes will employ Kaplan-Meier curves with log-rank testing.

Conditions
Breast Cancer
Being tested
Surgery options
Keywords
Breast Cancer, delayed Endoscopic DTI
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 optionsProcedure or surgery

    The different surgery options for patients Post-Mastectomy

Study groups in NCT07757074
Study groupRoleWhat they receive
Control group 1Delayed Endoscopic DTI Breast Reconstruction
Receives: Procedure: Surgery options
Control group 2Latissimus dorsi ± impalnt Breast Reconstruction
Receives: Procedure: Surgery options

What is being measured

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

  1. Aesthetic outcome evaluation--BREAST-Q scores

    The Satisfaction with Breasts module of BREAST-Q questionnaire is utilized to assess patient-reported aesthetic outcomes. Transformed scores range from 0 to 100, with higher scores indicating better outcomes. Both raw questionnaire scores and standardized transformed scores will be documented, along with pre- to postoperative differences in transformed scores

    Measured: Preoperative (baseline), 1-year postoperative

Secondary outcomes (10)
  1. Complications

    Skin flap thermal injury, skin flap ischemia/necrosis, nipple and areola complex(NAC) ischemia/necrosis, surgical site infection, incision dehiscence, surgical site bleeding or hematoma, seroma needing repeated aspiration or drain reinsertion, capsular contracture, prosthesis outline appearance, rippling, implant displacement, implant loss, readmission

    Measured: 1 year postoperative

  2. Surgical time

    data evaluation

    Measured: Intraoperative

  3. surgical-related costs

    perioperative data evaluation

    Measured: perioperative

  4. the rate of contralateral breast adjustment surgery

    perioperative data evaluation

    Measured: perioperative

  5. Quality of Life--BREAST-Q scores

    The Psychosocial Well-Being, Sexual Well-Being, and Physical Well-Being of the Chest modules of BREAST-Q questionnaire are used to evaluate quality of life (QoL) outcomes. Transformed scores range from 0 to 100, with higher values indicating better outcomes. Both raw questionnaire scores and standardized transformed scores will be recorded, along with pre- to postoperative differences in transformed scores.

    Measured: 1 year postoperative

  6. Aesthetic outcome evaluation--Harris score

    The Harris score was used to record the subjective judgment of symmetry of the reconstructed breast compared to the contralateral breast. The results were categorized as excellent (treated breast nearly identical to untreated breast), good (treated breast slightly different than untreated), fair (treated breast clearly different than untreated), and poor (treated breast seriously distorted)

    Measured: 1-year postoperative

  7. Aesthetic outcome evaluation--Ueda score

    Doctor-reported aesthetic outcomes will be evaluated by three professional breast surgeons using the Ueda scale, based on postoperative photographs. Scores range from 0 to 10 points, with higher values indicating better results. The categorized as follows: Excellent (≥9 points), Good (7-8 points), Fair (5-6 points), Poor (≤4 points). Both raw scores and categorizations will be documented

    Measured: 1-year postoperative

  8. Quality of Life--EORTC Quality of Life scores

    EORTC Scores are a series of questionnaires developed by the European Organisation for Research and Treatment of Cancer (EORTC) to assess the health-related quality of life (HRQoL) of cancer patients. These questionnaires are widely used in clinical trials and clinical practice to help evaluate treatment outcomes and patients' quality of life. The scoring range is from 0 to 100. A higher score in the functional domains indicates better functioning, while a higher score in the symptom domains indicates more severe symptoms

    Measured: 1-year postoperative

  9. Scar assessment--SCAR-Q scales

    The SCAR-Q questionnaire is utilized to assess patient-reported scar outcomes. Transformed scores range from 0 to 100, with higher scores indicating better outcomes. Both raw and standardized transformed scores will be documented, along with pre- to postoperative differences.

    Measured: 1-year postoperative

  10. Aesthetic outcome evaluation--aesthetic complications

    Capsular contracture, Implant visibility, Rippling, Implant displacement, Animation deformity, Pectoralis major pain.

    Measured: 1-year postoperative

Timeline

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

  1. First posted11 Aug 2026
  2. Study start1 Sep 2026 (estimated)
  3. Primary completion30 Sep 2028 (estimated)
  4. Study completion30 Sep 2028 (estimated)

Resources

More details

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

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Prospective
Enrolment
268 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07757074
Sponsor's protocol ID
2025(1441)
Acronym
DELTI
Status last verified
Aug 2026
First submitted
6 Mar 2026
Last updated
11 Aug 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: Qualified researchers can request access to anonymized individual patient-level data via the request portal. All IPD requests should be emailed to Dr. Zhenggui Du, the general project leader, and will be evaluated by Dr. Du and the head of the collaborating organization to decide whether to approve.

Publications

  • Santosa KB, Qi J, Kim HM, Hamill JB, Wilkins EG, Pusic AL. Long-term Patient-Reported Outcomes in Postmastectomy Breast Reconstruction. JAMA Surg. 2018 Oct 1;153(10):891-899. doi: 10.1001/jamasurg.2018.1677.

    PubMed 29926096
  • Bennett KG, Qi J, Kim HM, Hamill JB, Pusic AL, Wilkins EG. Comparison of 2-Year Complication Rates Among Common Techniques for Postmastectomy Breast Reconstruction. JAMA Surg. 2018 Oct 1;153(10):901-908. doi: 10.1001/jamasurg.2018.1687.

    PubMed 29926077
  • Jagsi R, Jiang J, Momoh AO, Alderman A, Giordano SH, Buchholz TA, Pierce LJ, Kronowitz SJ, Smith BD. Complications After Mastectomy and Immediate Breast Reconstruction for Breast Cancer: A Claims-Based Analysis. Ann Surg. 2016 Feb;263(2):219-27. doi: 10.1097/SLA.0000000000001177.

    PubMed 25876011
  • Ren Y, Yu Y, Xu K, Li Z, Wang X. Meta-Analysis of Immediate Implant-Based Breast Reconstruction Versus Autologous Breast Reconstruction in the Setting of PMRT. Aesthetic Plast Surg. 2024 May;48(10):1940-1948. doi: 10.1007/s00266-023-03430-y. Epub 2023 Jun 28.

    PubMed 37380747
  • Min K, Jeon DN, Han HH, Kim EK, Eom JS. Inframammary Fold Approach for Second-stage Operation in Expander-Implant Breast Reconstruction. Ann Plast Surg. 2021 Nov 1;87(5):501-505. doi: 10.1097/SAP.0000000000002629.

    PubMed 33346535
  • Movassaghi K, Gilson A, Stewart CN, Cusic J, Movassaghi A. Prepectoral Two-Stage Implant-Based Breast Reconstruction with Poly-4-Hydroxybutyrate for Pocket Control without the Use of Acellular Dermal Matrix: A 4-Year Review. Plast Reconstr Surg. 2024 Jul 1;154(1):15-24. doi: 10.1097/PRS.0000000000010914. Epub 2023 Jul 6.

    PubMed 37410610
  • Yang B, Ren G, Song E, Pan D, Zhang J, Wang Y, Liao N, Tang J, Wang X, Cui S, Jin F, Geng C, Sun Q, Li H, Fan Z, Cao X, Wang H, Wang S, Shao Z, Wu J. Current Status and Factors Influencing Surgical Options for Breast Cancer in China: A Nationwide Cross-Sectional Survey of 110 Hospitals. Oncologist. 2020 Oct;25(10):e1473-e1480. doi: 10.1634/theoncologist.2020-0001. Epub 2020 May 13.

    PubMed 32333626
  • Zhao R, Jin M, Gao J, Zhang L, Tao L, Bao X. A Cross-Sectional Study of Breast Cancer Surgery and the Cost Based on Data From 77 Chinese 3A Hospitals in 2015. Front Oncol. 2022 Apr 26;12:857359. doi: 10.3389/fonc.2022.857359. eCollection 2022.

    PubMed 35558511
  • Sun K, Zhang B, Lei S, Zheng R, Liang X, Li L, Feng X, Zhang S, Zeng H, Yao Y, Ma P, Wang S, Chen R, Han B, Wei W, He J. Incidence, mortality, and disability-adjusted life years of female breast cancer in China, 2022. Chin Med J (Engl). 2024 Oct 20;137(20):2429-2436. doi: 10.1097/CM9.0000000000003278. Epub 2024 Sep 5.

    PubMed 39238088
  • Sung H, Ferlay J, Siegel RL, Laversanne M, Soerjomataram I, Jemal A, Bray F. Global Cancer Statistics 2020: GLOBOCAN Estimates of Incidence and Mortality Worldwide for 36 Cancers in 185 Countries. CA Cancer J Clin. 2021 May;71(3):209-249. doi: 10.3322/caac.21660. Epub 2021 Feb 4.

    PubMed 33538338

Questions about this trial

What is this clinical trial studying?

An observational study of Breast Cancer, run by Du Zhenggui at 1 site in China.

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 3 inclusion and 6 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: opening soon, as of the sponsor's last update on 11 Aug 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 China. 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?

Contact Zhenggui Du (+86 13880768222, docduzg@163.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Aesthetic outcome evaluation--BREAST-Q scores (time frame: Preoperative (baseline), 1-year postoperative). 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 NCT07757074, which also lists 10 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 11 Aug 2026.

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