Risk Factor Analysis for Flap and Donor Site Related Complications in 1274 DIEP Flaps - Retrospective Single Center Study.

Background: Breast cancer is the most common cancer affecting women worldwide. In Germany, in almost 70% of cases, women require a complete mastectomy and wish for breast reconstruction which is especially difficult when the breast was previously irradiated. The DIEP flap is then the gold standard for autologous breast reconstruction and shows an overall low complication rate. This study aims to underline the safety of the procedure yet point out potential risk factors for flap edge and fat necrosis in a retrospective series of 1274 DIEP flaps in our center. Patients and Methods: 1274 autologous breast reconstructions with the DIEP flap were performed in 1124 patients between July 2004 and December 2014 in our department. Retrospective risk factor analysis included age, BMI, smoking, chemotherapy and/or radiotherapy and comorbidities. Mean follow-up constituted out of 24 months. Results: Out of 1274 free DIEP flap breast reconstructions, 150 were bilateral reconstructions. In 785 cases the primary indication was previous mastectomy, followed by prior implant-based reconstruction in 265 cases. The total flap loss rate was 0.6%. Patients with a higher BMI and smokers had significantly higher complication rates than the rest of the cohort. Elderly patients ( 65 years), patients with diabetes and ones who had undergone chemo-/ radiotherapy did not present with higher complication rates. Conclusions: The DIEP flap surgery is a well-established method for autologous breast reconstruction with a low complication rate. Yet patient characteristics in terms of risk factors need to be taken into account for result prognosis and satisfactory long-term reconstructive results.

The DIEP Flap as Well-established Method of Choice for Autologous Breast Reconstruction with a Low Complication Rate - Retrospective Single-centre 10-Year Experience.

Background Breast cancer is the most common cancer affecting women in Germany. Despite breast-conserving therapy (BCT) being carried out in almost 70% of cases, a high number of women still require complete mastectomy. Prophylactic mastectomy is also indicated for women with a BRCA 1/2 gene mutation. In addition to implant-based heterologous breast reconstruction, autologous breast reconstruction using a DIEP flap has been found to be beneficial, particularly for patients who had prior radiotherapy. This study aims to show that DIEP flap reconstruction surgery is the method of choice for autologous breast reconstruction with a low rate of complications. Patients and Methods Autologous breast reconstruction using a DIEP flap was performed in 1124 patients between July 2004 and December 2014. Retrospective study criteria included potential risk factors such as age, BMI, smoking, chemotherapy and/or radiotherapy, and comorbidities as well as outcome parameters such as postoperative complications. Outcomes were evaluated with a mean follow-up of 24 months. Results A total of 1124 patients underwent 1274 free DIEP flap breast reconstructions, of which 150 were bilateral reconstructions. The primary indication was previous mastectomy in 785 cases, followed by prior implant-based reconstruction in 265 cases. The total flap loss rate was 0.6%. Postoperative surgical revision for abdominal wall hernia was required in 0.2% of cases. The group with a higher BMI and the group of smokers had significantly higher complication rates. Elderly patients (> 65 years), patients who had undergone chemo-/radiotherapy and patients with diabetes did not have higher complication rates. Conclusion DIEP flap surgery is an excellent option for autologous breast reconstruction, with a low rate of donor site morbidity and low complication rates. DIEP flap surgery carried out in a specialised interdisciplinary breast centre in a standardised clinical setting after prior careful patient selection to take account of risk factors such as high BMI and smoking is a reliable method with a low complication rate and satisfactory long-term reconstruction results.

Autologous Breast Reconstruction with SIEA Flaps: An Alternative in Selected Cases.

BACKGROUND: The deep inferior epigastric perforator flap has been shown to be a reliable option for autologous breast reconstruction. A further refinement in the transfer of lower abdominal tissue is the superficial inferior epigastric artery (SIEA) flap that does not require any incision of the rectus abdominis fascia or muscle and is superior regarding donor-site morbidity. OBJECTIVES: We conducted a retrospective study to assess reliability and outcomes of autologous breast reconstruction using SIEA flaps. METHODS: We performed autologous breast reconstruction in 1708 patients at our department between 2009 and 2018. Of those, 28 patients that underwent breast reconstruction using a SIEA flap were included for a retrospective chart review. RESULTS: Given an overall flap loss rate of 1.8%, we observed total flap necrosis following a SIEA flap in four patients (13%). All cases were secondary to arterial thrombosis. We further recognized a significant correlation between flap failure and a history of spontaneous deep vein thrombosis (p < 0.0001). There was no statistically significant relationship between flap failure and obesity (BMI > 30 kg/m2;p = 0.9) or flap failure and a history of abdominal operations (p = 0.6). CONCLUSIONS: The SIEA flap provides a reasonable option for autologous breast reconstruction with the great advantage of minimal donor-site morbidity. Nevertheless, its use should be preserved to selected cases with favorable anatomy. We therefore recommend proper patient selection based on preoperative computed tomography angiography, intraoperative clinical evaluation and history of hypercoagulable state. LEVEL OF EVIDENCE IV: 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.

Increased risk of recurrence associated with certain risk factors in breast cancer patients after DIEP-flap reconstruction and lipofilling-a matched cohort study with 200 patients.

BACKGROUND: Lipofilling is performed in breast cancer patients to optimize the aesthetic outcome following breast reconstruction after mastectomy. Despite its common usage worldwide, little is known about the interaction of the lipoaspirate and dormant cancer cells. Up to date, no risk factors that increase the risk for cancer recurrence have been established. This study aims to identify risk factors for lipofilling candidates after breast cancer and questions the oncological safety of lipofilling in lymph node positive disease. METHODS: Matched retrospective cohort study: the disease-free survival (DFS) between 100 breast cancer patients undergoing a lipofilling after their DIEP-flap reconstruction and 100 matched control patients with no subsequent lipofilling was analyzed. Further, patients were subdivided according to risk factors, which were categorized as patient-dependent factors (PDFs) and tumor-dependent factors (TDFs). DFS and hazard ratios (HR) were compared to identify potential risk factors that may increase cancer recurrence. RESULTS: Median follow-up was 76.5 months from the mastectomy, and 31 months from the startpoint to the end of follow-up. Seven and eleven patients had recurrence in the lipofilling and control group, respectively, presenting with comparable DFS rates and an insignificant HR =0.57, 95% confidence interval (CI): 0.22-1.47, P=0.24. According to subgroup survival analysis, lipofilling increased the risk of recurrence in women with a positive nodal status (P=0.035) and a high-grade neoplasia (P=0.049). CONCLUSIONS: No general increased recurrence risk was observed between the lipofilling and control group. The subgroup analysis identified high-grade neoplasia and positive nodal status to be a risk factor for cancer recurrence. Patients with a known node positive disease have an increased risk of occult micrometastases in their lymph nodes. Further studies are necessary to clarify whether dormant breast cancer cells in form of micrometastases in the lymph nodes can be reactivated by the factors secreted by adipose derived stem cells.