Extracorporeal Support: Improves Donor Renal Graft Function After Cardiac Death

Donors after cardiac death (DCD) could increase the organ pool. Data supports good long-term renal graft survival. However, DCDs are 50 mL/h in all DCDs, except in DCD-30 (6.8 mL/h ± 1.7). DCD-30 had lower CrCl (0.9 mL/min ± 0.2) and higher UrPr >200 mg/dL, compared to other DCDs >10 mL/min and <160 mg/dL, respectively. Normothermic ECS can resuscitate kidneys to transplantable status after 30 min of cardiac arrest/WI.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/79164/1/j.1600-6143.2010.03063.x.pd

Abdominal Normothermic Regional Perfusion in Donation After Circulatory Death:A Systematic Review and Critical Appraisal

Background: Abdominal normothermic regional perfusion (aNRP) for donation after circulatory death is an emerging organ preservation technique that might lead to increased organ utilization per donor by facilitating viability testing, improving transplant outcome by early reversal of ischemia, and decreasing the risk of unintentional surgical damage. The aim of the current review is to evaluate the recent literature on the added value of aNRP when compared to local standard perfusion technique.Methods: The Preferred Reporting Items for Systematic reviews and Meta-Analyses guideline for systematic reviews was used, and relevant literature databases were searched. Primary outcomes were organ utilization rate and patient and graft survival after 1 year. Secondary outcomes included delayed graft function, primary nonfunction, serum creatinine, and biliary complications.Results: A total of 24 articles were included in this review. The technique is unanimously reported to be feasible and safe, but the available studies are characterized by considerable heterogeneity and bias.Conclusions: Uniform reported outcome measures are needed to draw more definitive conclusions on transplant outcomes and organ utilization. A randomized controlled trial comparing aNRP with standard procurement technique in donation after circulatory death donors would be needed to show the added value of the procedure and determine its place among modern preservation techniques.Transplant surger

The Association of Preoperative Magnetic Resonance Imaging (MRI) With Surgical Management in Patients With Early-Stage Breast Cancer

The rate of mastectomy in lumpectomy-eligible patients with unilateral breast cancer is increasing. We sought to investigate the association between magnetic resonance imaging (MRI) and surgical management of patients with early-stage breast cancer by comparing the rate of mastectomy as first surgery in patients with and without preoperative MRI.A bi-institutional retrospective study included patients diagnosed between 2016 and 2020. Lumpectomy-eligible patients with in situ and invasive cancer were included. Those receiving preoperative therapy, MRI before diagnosis, or with known bilateral cancer were excluded. The risk factors for bilateral and multicentric disease were accounted for. Fisher's exact and chi-square tests compared categorical variables, Wilcoxon two-sample test analyzed continuous variables, and multivariate analyses were performed with Poisson regression.Four hundred twenty-eight participants met inclusion criteria. Patients who received MRI were younger (58 versus 67 y; P < 0.001) and had denser breasts (group 3 or 4; 61% versus 25%; P < 0.001). Mastectomy rate was twice as high in patients undergoing MRI (32% versus 15%, rate ratio 2.16; P < 0.001), which remained significant in multivariate analysis (rate ratio 2.0; P < 0.001). Contralateral mastectomy (12% versus 4%; P = 0.466) and reexcision (13% versus 12%; P = 0.519) rates were similar. Time to surgery was greater in those receiving MRI alone and MRI biopsy (34 [no MRI] versus 45 [MRI] versus 62 [MRI biopsy]; P < 0.001 for both).MRI receipt is associated with a doubled rate of mastectomy in lumpectomy-eligible patients. Future work is needed to standardize patient selection for MRI to those with the highest likelihood of having additional undiagnosed disease

Abstract P3-03-20: The association of preoperative MRI with surgical decision-making in patients with early-stage breast cancer: A multi-institutional analysis

Abstract Background: Lumpectomy with radiation (breast conservation) and mastectomy have equivalent overall survival. However, recent studies suggest that patients undergoing breast conservation have lower rates of recurrence compared to those undergoing mastectomy. A 2013 meta-analysis by Houssami, et al. found that the rate of mastectomy in patients who had preoperative MRI was 16%, twice as high as that in patients who did not have preoperative MRI. A multi-institutional analysis was performed to investigate the possible impact of modern MRI on the surgical management of early-stage breast cancer (ESBC). Methods: A retrospective comparative cohort study included patients with in-situ and invasive breast cancer eligible for breast conservation surgery from two institutions (NY and FL). Patients who received preoperative systemic therapy were excluded. Eligibility for breast conservation was defined as clinical stage Tis-2. Risk factors for the bilateral or multicentric disease were compared between the two groups including breast density, menopausal status, and concerning family history. The rate of ipsilateral mastectomy in lumpectomy-eligible women was compared between patients who did and did not receive preoperative MRI. Chi-square analysis was used to compare rates between groups. P values <0.05 were considered statistically significant. Results: 505 patients diagnosed between 1/2016-4/2019 (NY) and 2/2020-12/2020 (FL) underwent primary surgery for ESBC. 434 did not receive neoadjuvant therapy and were included in the analysis. 292 (67.3%) had preoperative MRI. There was no difference in the proportion of patients who were premenopausal or who met the criteria for genetic testing by family history. The largest dimension on preoperative imaging was similar between the two groups. Patients who had MRI were younger (median age 58 vs. 68, p<0.001) and more likely to have group 3 or 4 breast density (64.5% vs. 27.1%, p<0.001). Patients who underwent preoperative MRI were twice as likely to undergo mastectomy as their first surgery (32.6% vs. 15.3%, p<0.001). The rate of re-excision was similar between the two groups (MRI 13.0% vs. no MRI 10.8% p=0.511). Of note, the final pathologic size of the invasive or in-situ component was similar between the two groups (Table 1). Conclusion: Younger age and greater breast density are associated with preoperative MRI receipt and all three factors likely play a role in choosing mastectomy. Young women with dense breasts represent a unique cohort of patients that may be particularly susceptible to cancer-related worry and anxiety related to additional biopsies, and therefore may be more likely to opt against continued breast imaging. Since approximately 70% of patients with ESBC undergo preoperative MRI, future work should focus on mitigating these challenges to improve shared decision-making. Table 1.Comparison of ESBC Patients Who Did and Did Not Receive MRIMRI (n=292) %, median (IQR)No MRI (n=142)%, median (IQR)p-valueAge58 years (50-65)68 years (60-76)<0.001bPremenopausal27%21%0.108Dense Breasts65%27%<0.001bMeet Criteria for Genetic Testing40%38%0.207Imaging Size13 mm (9-21)12 mm (8-20)0.315Mastectomy as First Surgery33%15%<0.001bPlan for Repeat Surgerya20%24%0.402Re-excision13%11%0.511Pathologic Size (Invasive)13 mm (8-20)13 mm (9-22)0.482Pathologic Size (DCIS)10 mm (5-20)8 mm (3-15)0.093aRepeat surgery includes re-excision, completion mastectomy, and axillary dissectionbDenotes significant p-values. Citation Format: Peter A Borowsky, Seraphina Choi, Orly Morgan, Amy K White, Claudya Morin, Jose Net, Susan Kesmodel, Neha Goel, Yamini Patel, Alexa Griffiths, Joshua A Feinberg, Aaron Kangas-Dick, Charusheela Andaz, Christina Giuliano, Natalie Zelenko, Donna-Marie Manasseh, Patrick Borgen, Kristin E Rojas. The association of preoperative MRI with surgical decision-making in patients with early-stage breast cancer: A multi-institutional analysis [abstract]. In: Proceedings of the 2021 San Antonio Breast Cancer Symposium; 2021 Dec 7-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2022;82(4 Suppl):Abstract nr P3-03-20

A Multi-institutional Analysis of Factors Influencing the Rate of Positive MRI Biopsy Among Women with Early-Stage Breast Cancer

The use of preoperative magnetic resonance imaging (MRI) for early-stage breast cancer (ESBC) is increasing, but its utility in detecting additional malignancy is unclear and delays surgical management (Jatoi and Benson in Future Oncol 9:347-353, 2013. https://doi.org/10.2217/fon.12.186 , Bleicher et al. J Am Coll Surg 209:180-187, 2009. https://doi.org/10.1016/j.jamcollsurg.2009.04.010 , Borowsky et al. J Surg Res 280:114-122, 2022. https://doi.org/10.1016/j.jss.2022.06.066 ). The present study sought to identify ESBC patients most likely to benefit from preoperative MRI by assessing the positive predictive values (PPVs) of ipsilateral and contralateral biopsies. A retrospective cohort study included patients with cTis-T2N0-N1 breast cancer from two institutions during 2016-2021. A "positive" biopsy result was defined as additional cancer (Positive ) or cancer with histology often excised (Positive ). The PPV of MRI biopsies was calculated with respect to age, family history, breast density, and histology. Uni- and multivariate logistic regression determined whether combinations of age younger than 50 years, dense breasts, family history, and pure ductal carcinoma in situ (DCIS) histology led to higher biopsy yield. Of the included patients, 447 received preoperative MRI and 131 underwent 149 MRI-guided biopsies (96 ipsilateral, 53 contralateral [18 bilateral]). Positive for ipsilateral biopsy was 54.2%, and Positive for contralateral biopsy was 17.0%. Positive for ipsilateral biopsy was 62.5%, and Positive for contralateral biopsy was 24.5%. Among the contralateral MRI biopsies, patients younger than 50 years were less likely to have Positive (odds ratio, 0.02; 95% confidence interval, 0.00-0.84; p = 0.041). The combinations of age, density, family history, and histology did not lead to a higher biopsy yield. Historically accepted factors for recommending preoperative MRI did not appear to confer a higher MRI biopsy yield. To prevent delays to surgical management, MRI should be carefully selected for individual patients most likely to benefit from additional imaging

Regional perfusion by extracorporeal membrane oxygenation of abdominal organs from donors after circulatory death: A systematic review

Organs from donors after circulatory death (DCDs) are particularly susceptible to the effects of warm ischemia injury. Regional perfusion (RP) by extracorporeal membrane oxygenation (ECMO) is increasingly being advocated as a useful remedy to the effects of ischemia/reperfusion injury, and it has been reported to enable the transplantation of organs from donors previously deemed unsuitable. The MEDLINE, Embase, and Cochrane databases were searched, and articles published between 1997 and 2013 were obtained. A systematic review was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Two hundred ten articles were identified, and 11 were eligible for inclusion. Four hundred eighty-two kidneys and 79 livers were transplanted from regional perfusion-supported donor after circulatory death (RP-DCD) sources. One-year graft survival was lower with uncontrolled RP-DCD liver transplantation, whereas 1-year patient survival was similar. Primary nonfunction and ischemic cholangiopathy were significantly more frequent with RP-DCDs versus donors after brain death (DBDs), but there was no difference in postoperative mortality between the 2 groups. The 1-year patient and graft survival rates for RP-DCD kidney transplantation were better than the rates with standard DCDs and were comparable to, if not better than, the rates with DBDs. At experienced centers, delayed graft function (DGF) for kidney transplantation from RP-DCDs was much less frequent in comparison with all other donor types. In conclusion, RP aids the recovery of DCD organs from ischemic injury and enables transplantation with acceptable survival. RP may help to increase the donor pool, but its benefits must still be balanced with the recognition of significantly higher rates of complications in liver transplantation. In kidney transplantation, significant reductions in DGF can be obtained with RP, and there are potentially important implications for long-term outcomes. Significant ethicolegal issues exist, and they are preventing a worldwide consensus on optimum RP protocols and an accurate appreciation of outcomes.</p