Treatment of Capsular Contracture in Previously Irradiated Breasts Implants and Expanders with the Use of Porcine Acellular Dermal Matrices: Outcomes and Complications.

Background: Radiation therapy is a crucial component of breast cancer treatment. However, it is well known to increase the risk of unsatisfactory cosmetic outcomes and higher complication rates. The aim of this study is to provide further insight into the use of acellular dermal matrices (ADMs) for the prevention of capsular contracture. Materials and Methods: This single-center, retrospective study analyzed irradiated patients who underwent post-mastectomy, ADM-assisted implant reconstructions. Of the 60 patients included, 26 underwent expander-to-implant substitution after radiotherapy (Group A), while 34 required implant replacement due to capsular contracture following radiotherapy (Group B). The primary objective was to evaluate the effectiveness of ADMs in reducing reconstructive failures, complications, and capsular contracture after breast irradiation. Results: We recorded a total of 15 complications and four implant losses. Reconstructive failures were attributed to implant exposure in two cases, full-thickness skin necrosis in one case, and severe Baker grade IV contracture in one case. Both Group A and Group B showed a significant decrease in postoperative Baker grades. US follow-up was used to demonstrate ADM integration with host tissues over time. Conclusions: Based on our findings, the use of ADM in selected cases appears to be a viable option for treating and preventing capsular contracture in irradiated breasts. This approach is associated with relatively low complication rates, a low rate of reconstructive failure, and satisfactory cosmetic outcomes and can be applied both in breast reconstructed with implants and with expanders.

Resection to restoration: Assessing the synergy of polypropylene mesh (Marlex®) combined with methyl-methacrylate and latissimus dorsi flap for primary chest wall sarcomas.

BACKGROUND: Chest-wall sarcomas are treated with extensive resections and complex defect reconstruction to restore chest-wall integrity. It is a difficult surgical procedure that incorporates a multidisciplinary approach for the best outcome, preventing paradoxical chest movement issues and reducing complications. OBJECTIVE: We aimed to describe our experience of chest-wall reconstruction using polypropylene mesh (Marlex® Mesh) combined with methyl-methacrylate and soft-tissue coverage with a latissimus dorsi flap following sarcoma resection. PATIENTS AND METHODS: Among the 53 patients treated for primary chest-wall sarcomas at the European Institute of Oncology (IEO) in Milan, Italy, from 1998 to 2020, 14 cases underwent chest-wall resection and reconstruction using polypropylene mesh, methyl-methacrylate and the latissimus dorsi flap. Patients with locally advanced breast cancers, locally advanced lung cancers, squamous cell carcinomas, and other secondary chest-wall malignancies were excluded from the study, as were the patients with different types of chest-wall reconstruction. RESULTS: In this study, 14 patients (6 men and 8 women) with various primary chest-wall sarcomas were enrolled. On an average, 2 ribs (range: 1-5) were removed during the surgeries, and the chest-wall defects ranged from 20 to 150 cm2 with an average size of 73 cm2. The mean follow-up period for these patients was approximately 63.80 months CONCLUSION: The combination of Marlex® mesh filled with methyl-methacrylate and covered using latissimus dorsi myocutaneous flap provides safe, low-cost and effective single-stage chest-wall reconstruction after surgery for primary sarcomas.

Non-contrast MRI and post-mastectomy silicone breast implant rupture: preventing false positive diagnoses.

BACKGROUND: Breast implants are not lifelong, with implant rupture being the third leading cause of revisional surgery in augmented women. Noncontrast MRI is a reliable tool to assess implant integrity; however, false positive and false negative diagnoses have been reported due to an incorrect interpretation of MRI signs. This study aims to investigate the incidence of these misleading results, comparing MRI findings with intraoperative surgical observations and exploring signs of nonunivocal interpretation. MATERIALS AND METHODS: Between March 2019 and October 2022, our hospital, a referral center for breast cancer care, conducted 139 breast MRI examinations to evaluate implant integrity. Surgical intervention was deemed necessary for patients diagnosed with suspected or confirmed implant rupture at MRI. Those patients who did not undergo any surgical procedure (63 cases) or had surgery at different institutes (11 cases) were excluded. RESULTS: Among the 65 patients who underwent preoperative MRI and subsequent surgery at our institute, surgical findings confirmed the preoperative MRI diagnosis in 48 women. Notably, 17 women exhibited a discordance between MRI and surgical findings: three false negatives, 11 false positives and three possible ruptures not confirmed. Signs of nonunivocal or misleading interpretation were assessed on a patient-by-patient basis. The importance of obtaining detailed information about a patient's breast implant, including fill materials, number of lumens, manufacturer and shape, proved immensely beneficial for interpreting MRI signs accurately. CONCLUSION: Pre-MRI knowledge of implant details and a meticulous evaluation of non-univocal signs can aid radiologists in accurately assessing implant integrity, reducing the risk of unnecessary revisional surgeries, and potentially averting allegations of medical malpractice.

Rib Reduction Technique in Patients with Isolated Chondrocostal Chest Wall Prominence Undergoing Breast Augmentation.

INTRODUCTION: When planning for breast augmentation, it is important to consider not only implant choice, surgical technique and patient desires, but also the chest wall shape and deformities or irregularities, which remain often underestimated. They can be responsible for implant malposition and breast asymmetry after augmentation. Chondrocostal junction prominence is a minor but frequent chest wall deformity. The aim of this study is to report a new technique for sculpturing isolated chondrocostal prominence deformities in patients undergoing breast augmentation. METHODS: A retrospective study was conducted to review surgical outcomes of a novel technique for costal prominence sculpturing and reshaping in patients undergoing breast augmentation. After reaching the subpectoral space, an inferiorly-based perichondral-periosteal flap is harvested just above the prominence. Once the deformity is corrected, the perichondral flap is repositioned over the sculpted rib. RESULTS: A total of six patients presenting with isolated chondrocostal prominence underwent bilateral breast implant placement and costal reduction using the described technique. Three patients were primary augmentations while the remaining patients were two secondary breast augmentation and one augmentation mastopexy. No complications were reported. No additional pain was referred at the side of rib remodelling in comparison with the contralateral breast. All the patients were satisfied with cosmetic results. CONCLUSIONS: The described technique for contouring of isolated chondrocostal deformities is fast, easy reproducible and offers advantages over the standard partial rib reduction technique. It can prevent implant malposition and projection asymmetry, eventually enhancing breast augmentation outcomes. LEVEL OF EVIDENCE V: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Reply to: A Two-Step Approach for Breast Augmentation with Chest Wall Deformity?

Patients asking for cosmetic breast surgery often appreciate that their breasts have an unpleasing appearance, but they often do not have a full appreciation of the degree of potential anatomic abnormalities of the chest wall and of the specific anatomical characteristics, which require a meticulous surgical planning and techniques in comparison with a standard breast cosmetic surgery. Failure to recognize this will predispose the patient to an unsatisfactory outcome and secondary deformities. To maximize surgical predictability and patients' satisfaction, the authors proposed a two-stage approach in the scenario of patients presenting with chest wall deformities and asking for breast augmentation. However, as we contemplate adopting the authors' approach to our case, we anticipate encountering two primary challenges. Firstly, utilizing custom-made 3D silicone implants might exacerbate the projection of the chondrocostal prominence present in our patient. Indeed, we believe that these implants are more beneficial for addressing concave defects (such as pectus excavatum) rather than convex prominences, as observed in our case.Level of Evidence V This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Reply to Comment to: Tuberous Breast Associated with Chest Wall Deformity: A Challenging Planning for Breast Augmentation.

Even in cases of noticeable breasts asymmetry, such as in our case, it is advisable to use implants with the same volume and projection, in order to maintain a similar breast footprint and allow a similar aging behavior over time. This can be achieved by reducing the size of the larger breast, thereby addressing the volume discrepancy before the placement of the implants. However, in our case, the skeletal deformities resulted in a significant disparity in the projection of the right and left sides of the chest wall, hindering the use of breast implants with identical projection. Therefore, due to this asymmetrical chest wall deformity, the left prosthesis was placed behind the central and lateral glandular parenchyma, avoiding hyper-projection in the medial part of the breast.Level of Evidence V This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Post-operative KEloids iRradiation (POKER): does the surgery/high-dose interventional radiotherapy association make a winning hand?

PURPOSE: To report the results involving post-operative interventional radiotherapy (POIRT) in a homogenous cohort of patients affected by keloid and treated at a single institution with the same fractionation schedule. PATIENTS AND METHODS: Inclusion criteria were: surgery with a histopathological diagnosis of keloid, subsequent high-dose rate interventional radiotherapy (HDR-IRT)-12 Gy in 4 fractions (3 Gy/fr) twice a day-and follow-up period ≥ 24 months. RESULTS: One-hundred and two patients and a total of 135 keloids were eligible for the analyses. Median follow-up was 64 [IQR: 25-103] months. Thirty-six (26.7%) recurrences were observed, 12-months and 36-months cumulative incidence of recurrence were 20.7% (95% CI 12.2-28.5) and 23.8% (95% CI 14.9-31.7) respectively. History of spontaneous keloids (HR = 7.00, 95% CI 2.79-17.6, p < 0.001), spontaneous cheloid as keloid cause (HR = 6.97, 95% CI 2.05-23.7, p = 0.002) and sternal (HR = 10.6, 95% CI 3.08-36.8, p < 0.001), ear (HR = 6.03, 95% CI 1.71-21.3, p = 0.005) or limb (HR = 18.8, 95% CI 5.14-68.7, p < 0.001) keloid sites were significantly associated to a higher risk of recurrence. CONCLUSIONS: The findings support the use of surgery and POIRT as an effective strategy for controlling keloid relapses. Further studies should focus on determining the optimal Biologically Effective Dose and on establishing a scoring system for patient selection.

How Does ChatGPT Perform on the Italian Residency Admission National Exam Compared to 15,869 Medical Graduates?

PURPOSE: The study aims to assess ChatGPT performance on the Residency Admission National Exam to evaluate ChatGPT's level of medical knowledge compared to graduate medical doctors in Italy. METHODS: ChatGPT3 was used in June 2023 to undertake the 2022 Italian Residency Admission National Exam-a 140 multiple choice questions computer-based exam taken by all Italian medical graduates yearly, used to assess basic science and applied medical knowledge. The exam was scored using the same criteria defined by the national educational governing body. The performance of ChatGPT was compared to the performance of the 15,869 medical graduates who took the exam in July 2022. Lastly, the integrity and quality of ChatGPT's responses were evaluated. RESULTS: ChatGPT answered correctly 122 out of 140 questions. The score ranked in the top 98.8th percentile among 15,869 medical graduates. Among the 18 incorrect answers, 10 were evaluating direct questions on basic science medical knowledge, while 8 were evaluating candidates' applied clinical knowledge and reasoning under the form of case presentation. Errors were logical (2 incorrect answers) and informational in nature (16 incorrect answers). Explanations to the correct answers were all evaluated as "appropriate." Comparison to national statistics related to the minimal score needed to match into each specialty, demonstrated that the performance of ChatGPT would have granted the candidate a match into any specialty. CONCLUSION: ChatGPT proved to be proficient in basic science medical knowledge and applied clinical knowledge. Future research should assess the impact and reliability of ChatGPT in clinical practice.

Consulting the Digital Doctor: Google Versus ChatGPT as Sources of Information on Breast Implant-Associated Anaplastic Large Cell Lymphoma and Breast Implant Illness.

BACKGROUND: Breast implant-associated anaplastic large cell lymphoma (BIA-ALCL) is a rare complication associated with the use of breast implants. Breast implant illness (BII) is another potentially concerning issue related to breast implants. This study aims to assess the quality of ChatGPT as a potential source of patient education by comparing the answers to frequently asked questions on BIA-ALCL and BII provided by ChatGPT and Google. METHODS: The Google and ChatGPT answers to the 10 most frequently asked questions on the search terms "breast implant associated anaplastic large cell lymphoma" and "breast implant illness" were recorded. Five blinded breast plastic surgeons were then asked to grade the quality of the answers according to the Global Quality Score (GQS). A Wilcoxon paired t-test was performed to evaluate the difference in GQS ratings for Google and ChatGPT answers. The sources provided by Google and ChatGPT were also categorized and assessed. RESULTS: In a comparison of answers provided by Google and ChatGPT on BIA-ALCL and BII, ChatGPT significantly outperformed Google. For BIA-ALCL, Google's average score was 2.72 ± 1.44, whereas ChatGPT scored an average of 4.18 ± 1.04 (p < 0.01). For BII, Google's average score was 2.66 ± 1.24, while ChatGPT scored an average of 4.28 ± 0.97 (p < 0.01). The superiority of ChatGPT's responses was attributed to their comprehensive nature and recognition of existing knowledge gaps. However, some of ChatGPT's answers had inaccessible sources. CONCLUSION: ChatGPT outperforms Google in providing high-quality answers to commonly asked questions on BIA-ALCL and BII, highlighting the potential of AI technologies in patient education. LEVEL OF EVIDENCE: Level III, comparative study LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Postmastectomy dual-plane submuscular-subcutaneous implant-based reconstruction: a series of 100 consecutive patients.

BACKGROUND: Advances in cancer knowledge and surgical techniques over the last decades have enabled plastic surgeons to use muscle-sparing procedures and more conservative approaches for implant-based reconstructions. In this paper, the authors describe an innovative subpectoral/subcutaneous implant pocket that represents an evolution of the classical submuscular technique and they report on the first consecutive hundred patients undergoing this procedure. METHODS: Between April 2019 and May 2022, 100 consecutive patients underwent immediate postmastectomy implant-based reconstruction using the subpectoral/subcutaneous space, for a total of 122 procedures. Medical records were retrospectively reviewed and patients were prospectively followed. During plastic consultations, medical photographs were taken and aesthetic outcomes were scored with patients. RESULTS: Mean follow-up was 18 months (range 6-46). Implant loss was observed in two patients (2%). Early minor complications were registered in 19 patients. A total of 80 out of 100 patients completed satisfaction survey assessing their postoperative outcomes. Results were considered satisfactory or very satisfactory by the surgeons and patients in more than 90% of cases. CONCLUSION: The submuscular/subcutaneous pocket can be considered a new tool in the armamentarium of reconstructive procedures, in between submuscular/subfascial procedures and prepectoral ones. It is a one-stage procedure, its a simple and short time surgery, reproducible, its very well accepted by patients. It has specific indications, advantages, and drawbacks, a careful indication and an accurate surgical technique are mandatory to achieve good results.

Tuberous Breasts Associated with Chest Wall Deformity: A Challenging Planning for Breast Augmentation.

Tuberous breast deformity is characterized by a deficiency in the vertical and horizontal dimensions of the breast, as well as breast underdevelopment and asymmetry. Concomitant chest wall deformities are not uncommon and increase the difficulty when planning breast augmentation in such patients. We present a unique case of tuberous breasts and chest wall deformity successfully treated employing a novel technique that incorporated breast implants and fat grafting. A 24-year-old patient with no significant past medical history presented to the plastic surgery clinic seeking correction of a severe breast asymmetry and desiring increase in breast volume. The right breast was Grolleau type 1 cup A, while the left breast was Grolleau type 3 cup C. The left hemithorax presented an accentuated prominence of the costochondral junction of 4th left rib, along with minor prominence of the 3rd and 5th left ribs. In addition, the 5th and 6th ribs were fused together. The surgical plan involved bilateral augmentation with implant and fat grafting. A 285 cc Motiva implant was placed subfascial on the right. Multiple refinements were necessary to the left breast, including areolar reduction, inframammary fold adjustment, and medial glandular modifications. A 140 cc Motiva implant was placed subfascial. Fat grafting was used in both breasts to enhance contour, projection and conceal the chest wall deformity. Postoperative recovery was uneventful, and results at 3-month follow-up showed improved breast symmetry and aesthetics.Level of Evidence V This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

One-step Glandular Reconstruction after Breast Implant Removal: Technical Refinements and Grafting of the Inferior Dermoglandular Flap.

The number of breast implant removal procedures are rising. Among the reasons why patients seek breast implant removal, the autoimmune/inflammatory syndrome induced by adjuvants (ASIA), also named breast implant illness, is increasingly common. ASIA is an entity that incorporates diverse autoimmune conditions induced by the exposure to various adjuvants, including silicone, and it is characterized by systemic symptoms reminiscent of autoimmune disorders. Implant removal has the most effective treatment for ASIA. We describe a technique for glandular cone reconstruction after complete capsulectomy and implant removal. It combines an inverted-T superomedial pedicled mastopexy with fat grafting of the breast quadrants and of the inferior dermoglandular flap in two patients affected by ASIA. Implant removal allowed symptom resolution in both patients at 10 and 12 months follow-up. Both patients were satisfied with the aesthetic outcome after implant removal in terms of breast softness, projection, and volume. Our technique is easy, reproducible, and allowed for restoration of breast contour, volume, and shape after implant removal. Although initially conceived in patients with ASIA, this technique can be used for patients seeking implant removal for any indication.

BIA-ALCL in patients with genetic predisposition for breast cancer: our experience and a review of the literature.

Breast implant-associated anaplastic large cell lymphoma (BIA-ALCL) is an emerging non-Hodgkin's lymphoma that occurs exclusively in patients with breast implants. The estimated risk of developing BIA-ALCL from exposure to breast implants is largely based on approximations about patients at risk. There is a growing body of evidence regarding the presence of specific germline mutations in patients developing BIA-ALCL, rising interest regarding possible markers of genetic predisposition to this type of lymphoma. The present paper focuses attention on BIA-ALCL in women with a genetic predisposition for breast cancer. We report our experience at the European Institute of Oncology, Milan, Italy, describing a case of BIA-ALCL in a BRCA1 mutation carrier who developed BIA-ALCL 5 years after implant-based post mastectomy reconstruction. She was treated successfully with an en-bloc capsulectomy. Additionally, we review the available literature on inherited genetic factors predisposing to the development of BIA-ALCL. In patients with genetic predisposition to breast cancer (mainly TP53 and BRCA1/2 germline mutations), BIA-ALCL prevalence seems to be higher and time to onset appears to be shorter in comparison to the general population. These high-risk patients are already included in close follow-up programs allowing the diagnosis of early-stage BIA-ALCL. For this reason, we do not believe that a different approach should be followed for postoperative surveillance.

Postmastectomy breast reconstruction for women with hereditary gastric and breast cancer syndrome.

Post mastectomy reconstruction is nowadays an integral part of breast cancer treatment, usually performed in the immediate setting. Among women with hereditary gastric and breast cancer syndromes, three different scenarios can be identified. First, healthy women seeking for prophylactic mastectomies. Second, cancer patients requiring mastectomy at the tumor site and simultaneous risk reducing mastectomy of the healthy breast. Third, cancer patients who have been treated for primary cancer requiring risk reducing mastectomies in a further stage. In this paper, we present a schematic guide for reconstruction for each subpopulation of subjects and their peculiarities.

Diagnostic performance of image-guided vacuum-assisted breast biopsy after neoadjuvant therapy for breast cancer: prospective pilot study.

BACKGROUND: Image-guided vacuum-assisted breast biopsy (VABB) of the tumour bed, performed after neoadjuvant therapy, is increasingly being used to assess residual cancer and to potentially identify to identify pathological complete response (pCR). In this study, the accuracy of preoperative VABB specimens was assessed and compared with surgical specimens in patients with triple-negative or human epidermal growth factor receptor 2 (HER2)-positive invasive ductal breast cancer after neoadjuvant therapy. As a secondary endpoint, the performance of contrast-enhanced MRI of the breast and PET-CT for response prediction was assessed. METHODS: This single-institution prospective pilot study enrolled patients from April 2018 to April 2021 with a complete response on imaging (iCR) who subsequently underwent VABB before surgery. Those with a pCR at VABB were included in the primary analysis of the accuracy of VABB. The performance of imaging (MRI and PET-CT) was analysed for prediction of a pCR considering both patients with an iCR and those with residual disease at postneoadjuvant therapy imaging. RESULTS: Twenty patients were included in the primary analysis. The median age was 44 (range 35-51) years. At surgery, 18 of 20 patients showed a complete response (accuracy 90 (95 per cent exact c.i. 68 to 99) per cent). Only two patients showed residual ductal intraepithelial neoplasia of grade 2 and 3 respectively. In the secondary analysis, accuracy was similar for MRI and PET-CT (77 versus 78 per cent; P = 0.76). CONCLUSION: VABB in patients with an iCR might be a promising method to select patients for de-escalation of surgical treatment in triple-negative or HER2-positive breast cancer. The present results support such an approach and should inform the design of future trials on de-escalation of surgery.

Ten-year results of hypofractionated whole breast radiotherapy and intraoperative electron boost in premenopausal women.

AIM: To evaluate outcome of intraoperative electron boost (IOERT) and hypofractionated whole breast irradiation (HWBI) for breast cancer (BC) in young women. METHODS AND MATERIALS: Women aged ≤ 48 with pT1-2 N0-1 BC received 12 Gy IOERT boost during conservative surgery followed by 3-dimensional conformal HWBI in 13 fractions (2.85 Gy/die). Local relapses (LR) and survival (disease-free, DFS; specific, BCSS; overall, OS) were analyzed. RESULTS: 481 consecutive BC patients, mostly node negative, with median age of 42 were treated between 2004 and 2014. Median tumor size was 1.48 cm and median IOERT collimator was 4 cm. After 25-day mean interval, HWBI was delivered. At a median follow-up of 9.6 years, there were 23 LRs (4.8 %, 9 of which were in the boost region). Ten-year LR cumulative incidence was 4.1 % (95 %CI, 2.5-6.3). Over time, local control rate decreased for Luminal A and HER2 positive with negative hormonal receptors, while remained steady for triple negative. At multivariate analysis, LR predictors included age < 40, extensive intraductal component and the use of 4-cm IOERT collimator size. Ten-year survival outcomes were as follows: DFS 80.0 % (95 % CI, 75.8-83.5), BCSS 97.5 % (95 % CI, 95.5-98.6 %), OS 96.5 % (95 % CI, 94.3-97.9). Luminal B HER2 negative had the worse survival outcomes. Perioperative complications were uncommon (16.4 %), acute toxicity was mild (<2% Grade 3), but moderate/severe fibrosis was described in 40.8 % of the cases. Cosmesis was scored as excellent/good in 86 % of the cases. CONCLUSIONS: ELIOT boost and HWBI achieved an excellent local control at the cost of tumor bed fibrosis. IOERT boost dose lower than 12 Gy is advisable.

A New Level II Oncoplastic Technique for Inferior Pole Defects: The Three-Petal Glandular Reconstruction (3-PR).

INTRODUCTION: Oncoplastic surgery (OPS) allows wide excisions and accurate tumor resection and reduces breast deformities by immediate reconstruction of large defects. Superior pedicled mammaplasties allow excellent results in large breasts. Conversely, loco-regional flaps are the standard of care in small-to-medium breasts. However, both techniques show limitations in case of large resections of the lower pole, resulting in skin retraction and downward deviation of nipple and areola. We present a new technique for inferior pole reconstruction to overcome these limitations. It is called "the three-petal reconstruction" (3-PR). METHODS: Between September 2016 and May 2019, ten patients with invasive breast cancer of the lower pole underwent breast conservation and 3-PR. RESULTS: The 3-PR was uneventful in all patients. No major or minor complications were recorded. Patient and surgeon evaluations scored as good to excellent in all cases. Surveillance examinations in the follow-up did not reveal calcifications nor any findings of suspicion within the reconstructed area. CONCLUSIONS: In case of very large defect of lower pole, the 3-PR reveals to be an easy, fast, reproducible method for inferior pole reconstruction. It can represent a niche between therapeutic mammaplasty and perforator flaps, and it could be added to existing available options for tailored reconstruction. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Oncoplastic Breast-Conserving Surgery for Synchronous Multicentric and Multifocal Tumors: Is It Oncologically Safe? A Retrospective Matched-Cohort Analysis.

BACKGROUND: Oncoplastic surgery is a well-established approach that combines breast-conserving treatment for breast cancer and plastic surgery techniques. Although this approach already has been described for multicentric and multifocal tumors, no long-term oncologic follow-up evaluation and no comparison with patients undergoing mastectomy have been published. This study aimed to evaluate whether oncoplastic surgery is a safe and reliable treatment for managing invasive primary multicentric and multifocal breast cancer. METHODS: The study compared a consecutive series of 100 patients with multicentric or multifocal tumors who had undergone oncoplastic surgery (study group) with 100 patients who had multicentric or multifocal tumors and had undergone mastectomy (control group) during a prolonged period. The end points evaluated were disease-free survival (DFS), overall survival (OS), cumulative incidence of local recurrence (CI-L), regional recurrence (CI-R), and distant recurrence (CI-D), all measured from the date of surgery. RESULTS: The OS and DFS were similar between the two groups. The incidence of local events was higher in the oncoplastic group, whereas the incidence of regional events was slightly higher in the mastectomy group. These differences were not statistically significant. The cumulative incidence of distant events was similar between the two groups. CONCLUSIONS: To the authors' knowledge, the current study provides the best available evidence suggesting that the oncoplastic approach is a safe and reliable treatment for managing invasive multifocal and multicentric breast cancers.