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Clinical Trial Details — Status: Suspended

Administrative data

NCT number NCT04151368
Other study ID # 19-5250.0
Secondary ID
Status Suspended
Phase N/A
First received
Last updated
Start date November 1, 2019
Est. completion date November 1, 2025

Study information

Verified date December 2023
Source University Health Network, Toronto
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Nipple-sparing mastectomy (NSM) with immediate reconstruction is one of the standard of care surgical treatments of breast cancer (BC) and is used for risk reduction in patients with a high risk for BC. While this method shows satisfactory oncologic and good cosmetic outcomes, its drawbacks include compromise of the skin flap vascularization due to skin incision, nipple-areolar complex (NAC) malposition/distortion and visible scar on the breast. NSM also has technical challenges of dissecting and removing larger specimens through limited incisions and concerns regarding oncologic effectiveness due to difficulties in visualizing regions of the breast remote from the incision. To improve cosmetic outcomes after NSM, a modification of this technique using a surgical robotic system was recently described. In a limited number of studies, the robotic NSM (RNSM) with immediate prosthetic breast reconstruction (IPBR) was shown to be feasible and safe, as well as led to excellent cosmetic outcomes and patient satisfaction. There are limited number of centers in North America and none in Canada that offer RNSM-IPBR. The investigators hypothesize that RNSM-IPBR is a feasible and safe technique that can be utilized in our institution and that it can provide superior cosmetic outcomes with less morbidity and higher patient satisfaction compared to the traditional NSM-IPBR. The aim is to conduct a single-arm prospective study to investigate the safety and feasibility, as well as cosmetic, surgical complication and patient satisfaction parameters of NSM-IPBR performed in the University Health Network (UHN). This study will serve a foundation for potential introduction of a novel surgical approach in our institution and will make it available for treatment and prevention of breast cancer in Canadian women. The study will also serve as pilot data for future potential studies, including randomized-controlled trials (RCT) comparing RNSM with conventional NSM. As such, the study will further our approach to innovation in breast surgical oncology within Canada and North America.


Description:

This is a single-arm prospective study to assess feasibility and safety (primary outcomes), as well as patient satisfaction, cosmetic and oncologic outcomes of RNSM-IPBR in women with BC or at high risk of BC treated at UHN. The objectives of the study are to determine: 1. Feasibility of RNSM-IPBR through assessing operative parameters (such as time of procedure, robot docking time, conversion to conventional NSM-IPBR). 2. Safety of RNSM-IPBR through assessing rate of morbidity from surgical complications (such as wound infection, flap and NAC necrosis, postoperative hematoma/bleeding, seroma requiring aspiration, implant loss, anesthesia related complications and need for reoperation with one month due to complications) and mortality due to the procedure. 3. Patient satisfaction from RNSM-IPBR through assessing psychological, physical, sexual well-being, as well as satisfaction with breast, overall outcome and care through patient reported outcomes. 4. Cosmetic outcomes of RNSM-IPBR, such as distortion or malposition of NAC and scarring, rate of reoperation due to unacceptable cosmetic outcomes. 5. Short- and long-term oncologic outcomes of NSM-IPBR, such as positivity of margins, breast cancer incidence and recurrence rate, as well as overall survival. The rationale of the study is to investigate a novel technique of RNSM-IPBR that might have superior cosmetic and patient satisfaction outcomes, as well as lower rates of complications, based on a small number of previously published studies from Europe and Asia. Once enrolled, clinical, radiologic, and pathologic data will be collected for each participant at the initial visit and follow up data will be collected via available electronic patient records. RNSM-IPBR will be performed by previously described method (Toesca et al.) using an extra-mammary axillary incision along the mid-axillary line in the axillary fossa. We will use Da Vinci Si Surgical System® (Intuitive Surgical, Sunnyvale, CA) available at Toronto General Hospital, UHN.


Recruitment information / eligibility

Status Suspended
Enrollment 30
Est. completion date November 1, 2025
Est. primary completion date November 1, 2025
Accepts healthy volunteers No
Gender Female
Age group 20 Years to 75 Years
Eligibility Inclusion Criteria: - Women of any age with invasive breast cancer (BC), ductal carcinoma in situ (DCIS), BRCA or other breast cancer genetic mutation carriers or high risk BC female patients who are otherwise candidates for NSM with IPBR will be eligible for the study. For those patients, RNSM-IPBR will be offered. Those who, after thorough discussion of risks and benefits, choose and consent to undergo RNSM-IPBR will be included in the study. Exclusion Criteria: - Heavy smokers (>20 cigarettes a day) - Uncompensated Diabetes Mellitus - High risk for anesthesia (ASA 4) - Inflammatory Breast Cancer - Previous thoracic radiation therapy for any reason - Pregnancy - Psychiatric, addictive, or any disorder which compromises ability to give informed consent for participation in this study

Study Design


Related Conditions & MeSH terms


Intervention

Procedure:
Robotic Nipple-Sparing Mastectomy (RNSM)
RNSM will be performed by previously described method using 3 cm extra-mammary axillary incision along the mid-axillary line in the axillary fossa. We will use Da Vinci Si Surgical System® (Intuitive Surgical, Sunnyvale, CA).

Locations

Country Name City State
Canada University Health Network Toronto Ontario

Sponsors (1)

Lead Sponsor Collaborator
University Health Network, Toronto

Country where clinical trial is conducted

Canada, 

References & Publications (2)

Sarfati B, Struk S, Leymarie N, Honart JF, Alkhashnam H, Tran de Fremicourt K, Conversano A, Rimareix F, Simon M, Michiels S, Kolb F. Robotic Prophylactic Nipple-Sparing Mastectomy with Immediate Prosthetic Breast Reconstruction: A Prospective Study. Ann Surg Oncol. 2018 Sep;25(9):2579-2586. doi: 10.1245/s10434-018-6555-x. Epub 2018 Jun 29. — View Citation

Toesca A, Peradze N, Manconi A, Galimberti V, Intra M, Colleoni M, Bonanni B, Curigliano G, Rietjens M, Viale G, Sacchini V, Veronesi P. Robotic nipple-sparing mastectomy for the treatment of breast cancer: Feasibility and safety study. Breast. 2017 Feb;31:51-56. doi: 10.1016/j.breast.2016.10.009. Epub 2016 Nov 2. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Primary Feasibility of RNSM Surgical time in minutes 1 month
Primary Wound complications Skin and Nipple necrosis 2 months
Primary Margins after RNSM Margin status (mm) 1 month
Primary Breast cancer recurrence Site of first relapse 36 months
Secondary Patient Satisfaction Breast Q Pre and Post-operative Surveys- items measuring satisfaction with appearance, surgical experience, breast shape and symmetry, psychosocial, physical and sexual well being. Lowest score = 0, highest = 100 with higher scores indicating better outcomes / quality of life. Pre-Operative and 6 and 12 months post-operative
Secondary Body Image Hopwood's Body Image Scale- Scores range from 0 (min distress) to 3 (max distress) for 10 questions. Lowest score = 0, highest = 30 with lower scores indicated lower body image distress. 6 months post-operative
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