A contemporary analysis of 20,086 deceased donor liver biopsies.

BACKGROUND: Pre-transplant deceased donor liver biopsy may impact decision making; however, interpretation of the results remains variable and depends on accepting center practice patterns. METHODS: In this cohort study, adult recipients from 04/01/2015-12/31/2020 were identified using the UNOS STARfile data. The deceased donor liver biopsies were stratified by risk based on degree of fibrosis, macrovesicular fat content, and level of portal infiltration (low-risk: no fibrosis, no portal infiltrates, and <30% macrosteatosis; moderate-risk: some fibrosis or mild infiltrates and <30% macrosteatosis; high-risk: most fibrosis, moderate/marked infiltrates, or ≥30% macrosteatosis). Graft utilization, donor risk profile, and recipient outcomes were compared across groups. RESULTS: Of the 51,094 donor livers available, 20,086 (39.3%) were biopsied, and 34,606 (67.7%) were transplanted. Of the transplanted livers, 14,908 (43.1%) were biopsied. The transplanted grafts had lower mean macrovesicular fat content (9.3% transplanted vs. 26.9% non-transplanted, P < 0.001) and less often had any degree of fibrosis (20.9% vs. 39.9%, P < 0.001) or portal infiltration (51.3% vs. 58.2%, P < 0.001) versus non-transplanted grafts. Post-transplant recipient LOS (14.2 days high-risk vs. 15.2 days low-risk, P = 0.170) and 1-year graft survival (90.5% vs. 91.7%, P = 0.137) did not differ significantly between high- versus low-risk groups. Kaplan-Meier survival estimates further revealed no differences in the 5-year graft survival across risk strata (P = 0.833). Of the 5178 grafts biopsied and turned down, PSM revealed 1338 (26.0%) were potentially useable based on biopsy results and donor characteristics. CONCLUSION: Carefully matched deceased donor livers with some fibrosis, inflammation, or steatosis ≥30% may be suitable for transplantation. Further study of this group of grafts may decrease turndowns of potentially useable organs.

Normothermic machine perfusion for older transplant recipients.

INTRODUCTION: Elderly patients (≥65 years old) are increasingly undergoing liver transplantation and are more likely to be removed from the waitlist. Normothermic machine perfusion (NMP) holds promise in expanding the number of livers available for transplant and improving outcomes for marginal donors and recipients. We aimed to determine the impact of NMP on outcomes in elderly recipients at our institution and nationally using the UNOS database. METHODS: The use of NMP on outcomes in elderly recipients was reviewed using both the UNOS/SRTR database (2016-2022) and institutional data (2018-2020). Characteristics and clinical outcomes were compared between the NMP and static cold (control) groups within both populations. RESULTS: Nationally, using the UNOS/SRTR database, we identified 165 elderly recipients from 28 centers who received a liver allograft undergoing NMP and 4270 that underwent traditional cold static storage. NMP donors were older (48.3 vs. 43.4 years, p < 0.01), had similar rates of steatosis (8.5% vs 8.5%, p = 0.58), were more likely to be from a DCD (41.8% vs 12.3%, p < 0.01), and had a higher donor risk index (DRI; 1.70 vs. 1.60, p < 0.02). NMP recipients had similar age but had a lower MELD score at transplant (17.9 vs. 20.7, p = 0.01). Despite increased marginality of the donor graft, NMP recipients had similar allograft survival and decreased length of stay, even after accounting for recipient characteristics including MELD. Institutional data showed that 10 elderly recipients underwent NMP and 68 underwent cold static storage. At our institution, NMP recipients had a similar length of stay, rates of complications, and readmissions. CONCLUSIONS: NMP may mitigate donor risk factors that are relative contraindications for transplantation in elderly liver recipients, increasing the donor pool. The application of NMP in older recipients should be considered.

Simultaneous ex vivo normothermic preservation of liver and heart grafts from a donation after circulatory death donor.

Normothermic machine perfusion of organs is growing in popularity and has been used for both abdominal and thoracic organ preservation before transplantation. The use of normothermic machine perfusion for donation after cardiac death organs can reduce cold ischemia time and help prevent ischemia-related complications. We present a successful case of a donation after cardiac death procurement with both liver and heart allografts preserved by normothermic machine perfusion. Both allografts were perfused without complications and transplanted successfully. As the technology continues to become more prevalent, the situation described will become more commonplace, and we offer a view of the future in transplantation.

Liver Transplantation in the Time of a Pandemic: A Widening of the Racial and Socioeconomic Health Care Gap During COVID-19.

OBJECTIVE: During the initial wave of the COVID-19 pandemic, organ transplantation was classified a CMS Tier 3b procedure which should not be postponed. The differential impact of the pandemic on access to liver transplantation was assessed. SUMMARY BACKGROUND DATA: Disparities in organ access and transplant outcomes among vulnerable populations have served as obstacles in liver transplantation. METHODS: Using UNOS STARfile data, adult waitlisted candidates were identified from March 1, 2020 to November 30, 2020 (n = 21,702 pandemic) and March 1, 2019 to November 30, 2019 (n = 22,797 pre-pandemic), and further categorized and analyzed by time periods: March to May (Period 1), June to August (Period 2), and September to November (Period 3). Comparisons between pandemic and pre-pandemic groups included: Minority status, demographics, diagnosis, MELD, insurance type, and transplant center characteristics. Liver transplant centers (n = 113) were divided into tertiles by volume (small, medium, large) for further analyses. Multivariable logistic regression was fitted to assess odds of transplant. Competing risk regression was used to predict probability of removal from the waitlist due to transplantation or death and sickness. Additional temporal analyses were performed to assess changes in outcomes over the course of the pandemic. RESULTS: During Period 1 of the pandemic, Minorities showed greater reduction in both listing (-14% vs -12% Whites), and transplant (-15% vs -7% Whites), despite a higher median MELD at transplant (23 vs 20 Whites, P < 0.001). Of candidates with public insurance, Minorities demonstrated an 18.5% decrease in transplants during Period 1 (vs -8% Whites). Although large programs increased transplants during Period 1, accounting for 61.5% of liver transplants versus 53.4% pre-pandemic (P < 0.001), Minorities constituted significantly fewer transplants at these programs during this time period (27.7% pandemic vs 31.7% pre-pandemic, P = 0.04). Although improvements in disparities in candidate listings, removals, and transplants were observed during Periods 2 and 3, the adjusted odds ratio of transplant for Minorities was 0.89 (95% CI 0.83-0.96, P = 0.001) over the entire pandemic period. CONCLUSIONS: COVID-19's effect on access to liver transplantation has been ubiquitous. However, Minorities, especially those with public insurance, have been disproportionately affected. Importantly, despite the uncertainty and challenges, our systems have remarkable resiliency, as demonstrated by the temporal improvements observed during Periods 2 and 3. As the pandemic persists, and the aftermath ensues, health care systems must consciously strive to identify and equitably serve vulnerable populations.

Making Every Liver Count: Increased Transplant Yield of Donor Livers Through Normothermic Machine Perfusion.

OBJECTIVE: Normothermic machine perfusion (NMP) enables optimized ex-vivo preservation of a donor liver in a normal physiologic state. The impact of this emerging technology on donor liver utilization has yet to be assessed. SUMMARY BACKGROUND DATA: NMP of the donor liver and ex-vivo enhancement of its function has been envisioned for decades, however only with recent technological advances have devices been suitable for transition to clinical practice. The present study examines the effect NMP on liver utilization in the United States. METHODS: The United Network for Organ Sharing database was queried to identify deceased donor livers procured from 2016 to 2019 (n = 30596). Donor livers were divided by preservation method: standard cold-static preservation (COLD, n = 30,368) versus NMP (n = 228). Donor and recipient risk factors, liver disposition, and discard reasons were analyzed. The primary outcome was liver discard rate between 2 groups. RESULTS: A total of 4037 livers were discarded. The NMP group had a 3.5% discard rate versus 13.3% in the COLD group (P < 0.001), and this was despite NMP donors being older (47.7 vs 39.5 years, P < 0.0001), more frequently donation after cardiac death (DCD) (18% vs 7%, P < 0.001), and having a greater donor risk index (1.6 vs 1.5, P < 0.05). The most common reasons for liver discard in the COLD group were biopsy findings (38%), DCD warm ischemic time (11%), and prolonged preservation time (10%). Survival analysis, following propensity score matching, found no significant difference in 1-year overall survival between recipients of NMP versus COLD livers. CONCLUSIONS: NMP reduces the discard rate of procured livers despite its use in donors traditionally considered of more marginal quality. NMP maintains excellent graft and patient survival. Broader application of NMP technology holds the potential to generate a significant number of additional liver grafts for transplantation every year, thus greatly reducing the nationwide disparity between supply and demand.

Extracorporeal membrane oxygenation support following liver transplantation-A case series.

BACKGROUND: Postoperative severe cardiopulmonary failure carries a high rate of mortality. Extracorporeal membrane oxygenation (ECMO) can be used as a salvage therapy when conventional therapies fail. METHODS: We retrospectively reviewed our experience with ECMO support in the early postoperative period after liver transplant between September 2011 and May 2016. RESULTS: Out of 537 liver transplants performed at our institution, seven patients required ECMO support with a median age of 52 and a median MELD score of 28. Veno-venous ECMO was used in four patients with severe respiratory failure while the rest required veno-arterial ECMO for circulatory failure. The median time from transplant to cannulation was 3 days with a median duration of ECMO support of 7 days. All patients except one were successfully decannulated. The median hospital length of stay was 58 days with an in-hospital mortality of 28.6%. CONCLUSION: Extracorporeal membrane oxygenation can be considered a viable rescue therapy in the setting of severe postoperative cardiopulmonary failure. Extracorporeal membrane oxygenation therapy was successful in saving patients who were otherwise unsalvageable.

Molecular Adsorbent Recirculating System Effectively Replaces Hepatic Function in Severe Acute Liver Failure.

BACKGROUND DATA: Patients with severe acute liver failure (ALF) have extreme physiologic dysfunction and often die if transplantation is not immediately available. Patients may be supported with MARS (Baxter International Inc., Deerfield, IL) until transplantation or spontaneous recovery occurs. We present the largest series in the United States of MARS therapy as temporary hepatic replacement for ALF. METHODS: MARS was used to support patients with severe liver trauma (SLT), in ALF patients as a bridge to transplantation (BTT), and as definitive therapy for toxic ingestion or idiopathic liver failure (DT) in a level 1 trauma center and large transplant center. Patient demographics, etiology of ALF, and laboratory values were recorded. Endpoints were patient survival ± liver transplant and/or recovery of liver function. RESULTS: Twenty-seven patients with severe ALF received MARS therapy. Five patients with SLT had a 60% survival with recovery of liver and renal function. Thirteen patients received MARS as a BTT, of which 9 were transplanted with a 1-year survival of 78% (program overall survival 85% at 1 year). All 4 who were not transplanted expired. Nine patients with ALF from toxic ingestion received MARS as DT with liver recovery and survival in 67%. MARS therapy resulted in significant improvement in liver function, coagulation, incidence of encephalopathy, and creatinine. CONCLUSIONS: MARS therapy successfully replaced hepatic function in ALF allowing time for spontaneous recovery or transplantation. Spontaneous recovery was remarkably common if support can be sustained.

Resolution of donor non-alcoholic fatty liver disease following liver transplantation.

INTRODUCTION: Transplant surgeons conventionally select against livers displaying high degrees (>30%) of macrosteatosis (MaS), out of concern for primary non-function or severe graft dysfunction. As such, there is relatively limited experience with such livers, and the natural history remains incompletely characterized. We present our experience of transplanted livers with high degrees of MaS and microsteatosis (MiS), with a focus on the histopathologic and clinical outcomes. METHODS: Twenty-nine cases were identified with liver biopsies available from both the donor and the corresponding liver transplant recipient. Donor liver biopsies displayed either MaS or MiS ≥15%, while all recipients received postoperative liver biopsies for cause. RESULTS: The mean donor MaS and MiS were 15.6% (range 0%-60%) and 41.3% (7.5%-97.5%), respectively. MaS decreased significantly from donor (M=15.6%) to recipient postoperative biopsies (M=0.86%), P<.001. Similarly, MiS decreased significantly from donor biopsies (M=41.3%) to recipient postoperative biopsies (M=1.8%), P<.001. At a median of 68 days postoperatively (range 4-384), full resolution of MaS and MiS was observed in 27 of 29 recipients. CONCLUSIONS: High degrees of MaS and MiS in donor livers resolve in recipients following liver transplantation. Further insight into the mechanisms responsible for treating fatty liver diseases could translate into therapeutic targets.

Transplant versus resection for the management of hepatocellular carcinoma meeting Milan Criteria in the MELD exception era at a single institution in a UNOS region with short wait times.

BACKGROUND: Management of hepatocellular carcinoma (HCC) in the Model for End-Stage Liver Disease (MELD) exception era remains regionally variable. Outcomes were compared for patients undergoing transplant versus resection at a single institution in a UNOS region with short wait times for organ availability. METHODS: All patients who underwent resection of HCC from January 2000 to August 2012 and patients who underwent transplant post-January 2006, during the Milan Criteria (MC)-based MELD exception policy for HCC, were identified. Primary outcomes were overall survival (OS) and recurrence-free survival (RFS). RESULTS: Two hundred fifty-seven patients were analyzed, of whom 131 underwent transplant and 126 underwent resection. All transplant patients met MC; 45 (36%) resection patients met MC. Median follow-up time was 30 months. Median wait time to transplant was 55 days; no patients dropped off the waitlist while awaiting an organ. Among patients meeting MC, transplant demonstrated significantly greater 5-year OS (65.7% vs. 43.8%; P = 0.005) and RFS (85.3% vs. 22.7%; P < 0.001) versus resection. For patients with hepatitis C, transplant (n = 87) demonstrated significantly improved 5-year outcomes compared to patients meeting MC who underwent resection (n = 21; OS: 63.5% vs. 23.3%; P = 0.001; RFS: 83.5% vs. 23.7%; P < 0.001). CONCLUSION: In a region with short waitlist times for organ availability, liver transplant is associated with improved survival compared to resection for HCC within MC and should be considered for all patients meeting MC, particularly those with hepatitis C.

Survival, efficacy, and safety of small versus large doxorubicin drug-eluting beads TACE chemoembolization in patients with unresectable HCC.

OBJECTIVE: The purpose of this study was to investigate the overall survival, efficacy, and safety of small (100-300 µm) versus large (300-500 and 500-700 µm) doxorubicin drug-eluting beads transarterial chemoembolization (DEB TACE) in patients with unresectable hepatocellular carcinoma (HCC). MATERIALS AND METHODS: Ninety-four consecutive patients with unresectable HCC who underwent 269 DEB TACE procedures in 48 months were studied. DEB TACE procedures were performed using different DEB sizes: 100-300 µm (Group A, 59 patients) and with mixed 300-500 and 500-700 µm DEB (Group B, 35 patients). Survival rates were compared between the groups. RESULTS: The overall median survival in groups A and B were 15.1 and 11.1 months, respectively (p=0.005). Both groups were similar in demographics, tumor burden, and differential staging (p>0.5). Substratification of overall survival according to Child-Pugh class and Okuda, Cancer of the Liver Italian Program (CLIP), and Barcelona Clinic Liver Cancer (BCLC) staging were significantly higher in group A than in group B (p<0.05). Common terminology criteria for adverse events (CTCAE) grade III adverse events and 30-day mortality were significantly lower in group A than in group B (6.8% vs 20%; p=0.04, and 0% vs 14.3%; p=0.001, respectively). The particle size, Child-Pugh class, and serum α-fetoprotein level were significant prognostic indicators of survival on multivariate analysis. CONCLUSION: TACE with 100-300 µm sized DEB is associated with significantly higher survival rate and lower complications than TACE with 300-500 and 500-700 µm sized DEB.

Racial and Ethnic Disparities in Liver Transplantation for Alcohol-associated Liver Diseases in the United States.

BACKGROUND: Emerging data suggest disparities exist in liver transplantation (LT) for alcohol-associated liver disease (ALD). As the incidence of ALD increases, we aimed to characterize recent trends in ALD LT frequency and outcomes, including racial and ethnic disparities. METHODS: Using United Network for Organ Sharing/Organ Procurement and Transplantation Network data (2015 through 2021), we evaluated LT frequency, waitlist mortality, and graft survival among US adults with ALD (alcohol-associated hepatitis [AH] and alcohol-associated cirrhosis [AAC]) stratified by race and ethnicity. We used adjusted competing-risk regression analysis to evaluate waitlist outcomes, Kaplan-Meier analysis to illustrate graft survival, and Cox proportional hazards modeling to identify factors associated with graft survival. RESULTS: There were 1211 AH and 26 526 AAC new LT waitlist additions, with 970 AH and 15 522 AAC LTs performed. Compared with non-Hispanic White patients (NHWs) with AAC, higher hazards of waitlist death were observed for Hispanic (subdistribution hazard ratio [SHR] = 1.23, 95% confidence interval [CI]: 1.16-1.32), Asian (SHR = 1.22, 95% CI:1. 01-1.47), and American Indian/Alaskan Native (SHR = 1.42, 95% CI: 1.15-1.76) candidates. Similarly, significantly higher graft failures were observed in non-Hispanic Black (HR = 1.32, 95% CI: 1.09-1.61) and American Indian/Alaskan Native (HR = 1.65, 95% CI: 1.15-2.38) patients with AAC than NHWs. We did not observe differences in waitlist or post-LT outcomes by race or ethnicity in AH, although analyses were limited by small subgroups. CONCLUSIONS: Significant racial and ethnic disparities exist for ALD LT frequency and outcomes in the United States. Compared with NHWs, racial and ethnic minorities with AAC experience increased risk of waitlist mortality and graft failure. Efforts are needed to identify determinants for LT disparities in ALD that can inform intervention strategies.

Evaluation of clinical outcomes of prophylactic versus preemptive cytomegalovirus strategy in liver transplant recipients.

Cytomegalovirus (CMV) is a major cause of morbidity and mortality following solid organ transplantation (SOT). Two strategies, prophylactic, and preemptive have emerged for the prevention of CMV infection and disease after SOT. This retrospective chart review of two liver transplant cohorts: prophylactic and preemptive, compares the clinical impact of transitioning from prophylactic to preemptive strategy. The primary outcome is the incidence of CMV viremia at 3-and 6-months post-transplant. Secondary outcomes include: incidence of CMV tissue-invasive disease, acute cellular rejection, leukopenia and neutropenia, opportunistic infection rates, hospital readmission rates, and mortality at 3-and 6-months post-transplant. A total of 109 patients were included in the analysis. The incidence of CMV viremia was 4.9% and 50.0% (P < 0.001) in the prophylactic versus preemptive cohort, respectively, at 3 months post-transplant. The incidence of CMV viremia was 24.6% and 8.3% (P = 0.026) in the prophylactic versus preemptive cohort, respectively, at 6 months post-transplant. There were no statistical significant differences in the secondary outcomes between both cohorts. In conclusion, there is a statistical significant difference in time to onset of CMV viremia; however, the use of either prophylactic or preemptive strategy was not associated with significant negative clinical outcomes of CMV.

Liver Transplantation in Elderly Recipients: Is Age Just a Number?

BACKGROUND: The proportion of older patients on the liver transplant waitlist continues to increase. With limited existing data to guide liver transplant evaluation of elderly patients, we aimed to study selection practices and outcomes of patients ≥70 years old. We hypothesized that 1-year patient and graft survival would not differ between appropriately selected elderly patients and those who are younger. METHODS: All patients referred for liver transplantation between 2018 and 2020 were stratified into elderly (age ≥70) and young (age <70) cohorts. Evaluation data pertaining to medical, surgical, and psychosocial risk assessment were reviewed. Recipient characteristics and post-operative outcomes, primarily 1-year graft and patient survival, were compared, with a median follow-up of 16.4 months. RESULTS: 322 patients underwent transplant out of 2331 referred. Elderly patients represented 230 of these referrals and 20 underwent transplant. The most common reasons for denial of elderly patients were multiple medical comorbidities (49%), cardiac risk (15%) and psychosocial barriers (13%). The median MELD of elderly recipients was lower (19 vs 24, P = .02), and proportion of hepatocellular carcinoma was higher (60% vs 23%, P < .001). There was no difference in 1-year graft (elderly 90.9% vs young 93.3%, P = .72) or patient survival (elderly 90.9% vs young 94.7%, P = .88). DISCUSSION: Liver transplant outcomes and survival are not affected by advanced age in carefully evaluated and selected recipients. Age should not be considered an absolute contraindication for liver transplant referral. Efforts should be made to develop guidelines for risk stratification and donor-recipient matching that optimize outcomes in elderly patients.

No Stone Left Unturned: Utilization of an Organ Procurement Organization Donor Surgeon at Procurement Reduces Discards of Marginal Liver Allografts.

BACKGROUND: The recent trend of organ procurement organizations (OPOs) employing independent surgeons for organ procurement has been developed with the goal of improving the supply of suitable organs for transplantation. We investigated the effects that the addition of an OPO-employed, organ-procurement specialist has on liver allograft discard rate, marginal organ utilization, and graft survival. METHODS: Organ Procurement and Transplant Network and OPO data were retrospectively studied between April 1, 2014' and July 31, 2019' within the Southwest Transplant Alliance donor service area. Liver procurements with an OPO-surgeon present (OPO-Present) were compared to those without the involvement of an OPO surgeon (OPO-Absent). Donor and recipient characteristics as well as outcomes were analyzed across groups using propensity score matching. RESULTS: In total 869 OPO-Present liver allografts had similar rates of discard (5.2%) compared to 771 OPO-Absent livers (5.8%). However, after adjusting for donor risk, OPO-Present livers had a lower propensity of discard compared to OPO-Absent (3.4% versus 7.6%, P < 0.05). OPO-Present livers were more likely to be shared nationally (11.0% versus 4.8%, P < 0.001). Outcome analysis showed allograft survival of OPO-Present livers at 5 y was comparable to OPO-Absent livers (79.5% versus 80%, P = 0.34). CONCLUSIONS: The presence of an OPO surgeon was associated with decreased liver allograft discard and increased utilization of marginal donor organs. The OPO surgeon's presence represents a potential strategy to increase organ utilization nationally.

Is there value in volume? An assessment of liver transplant practices in the United States since the inception of MELD.

BACKGROUND: Liver transplantation has increased in volume and provides substantial survival benefit. However, there remains a need for value-based assessment of this costly procedure. METHODS: Model for end stage liver disease era adult recipients were identified using United Network for Organ Sharing Standard Transplant Analysis file data (n = 75,988) and compared across time periods (period A: February 2002 to January 2007; B: February 2007 to January 2013; C: February 2013 to January 2019). Liver centers were divided into volume tertiles for each period (small, medium, large). Value for the index transplant episode was defined as percentage graft survival ≥1 year divided by mean posttransplant duration of stay. RESULTS: All centers increased value over time due to ubiquitous improvement in 1-year graft survival. However, large centers demonstrated the most significant value change (large +17% vs small +7.0%, P < .001) due to a -8.5% reduction in large centers duration of stay from period A to C, while small centers duration of stay remained unchanged (-0.1%). Large centers delivered higher value despite more complex care: older recipients (54.8 ± 10.3 vs 53.0 ± 11.4 years P < .001), fewer model for end stage liver disease exceptions (34.0% vs 38.2%, P < .001), higher rates of candidate portal vein thrombosis (10.1% vs 8.5%, P < .001) and prior abdominal surgery (43.4% vs 37.4%, P < .001), and more marginal donor utilization (donor risk index 1.45 ± 0.38 vs 1.36 ± 0.33, P < .001). Mahalanobis metric matching demonstrated that compared with small centers, large centers progressively shortened recipient duration of stay per transplant in each period (A: -0.36 days, P = .437; B: -2.14 days, P < .001; C: -2.49 days, P < .001). CONCLUSION: There is value in liver transplant volume. Adoption of value-based practices from large centers may allow optimization of health care delivery for this costly procedure.

Hepatocellular carcinoma lesion characterization: single-institution clinical performance review of multiphase gadolinium-enhanced MR imaging--comparison to prior same-center results after MR systems improvements.

PURPOSE: To measure diagnostic performance in the detection of hepatocellular carcinoma (HCC) by using the most recent technology and multiphase gadolinium-enhanced magnetic resonance (MR) imaging and to compare with earlier results at the same institution. MATERIALS AND METHODS: This retrospective study was institutional review board approved and HIPAA compliant. Informed consent was obtained. Between January 2008 and April 2010, 101 patients underwent liver transplantation and pretransplantation abdominal MR imaging within 90 days. Prospective image interpretations from the clinical record were reviewed for documentation of HCC, including size, number, and location. Liver explant histologic examination provided the reference standard for lesion analysis and was performed in axial gross slices in conjunction with the MR imaging report for direct comparison. Tumors were categorized according to size (≥ 2 cm or <2 cm), and MR imaging detection sensitivity, specificity, predictive values, and accuracy were calculated according to category. The Fisher exact test was used to compare results from this study against prior reported results. RESULTS: Thirty-five (34.7%) of 101 patients had HCC at explant analysis. Patient-based analysis of all lesions showed a sensitivity and specificity of 97.1% (34 of 35) and 100% (66 of 66), respectively. For lesions 2 cm or larger, MR imaging had a sensitivity and specificity of 100% (23 of 23) and 100% (78 of 78), respectively. For lesions smaller than 2 cm, MR imaging had a sensitivity and specificity of 82.6% (19 of 23) and 100% (78 of 78), respectively. Lesion-based sensitivity for all tumors was 91.4% (53 of 58) in the current study, compared with 77.8% in 2007 (P = .07). For lesions smaller than 2 cm, the sensitivity was 87.5% (28 of 32) in the current study, compared with 55.6% previously (P = .02). CONCLUSION: MR imaging remains a highly accurate diagnostic method for the preoperative evaluation of HCC, and detection of small (<2 cm) tumors has been significantly improved compared with that of earlier studies.

Liver transplantation for the treatment of hepatocellular carcinoma.

The rise of infection with hepatitis C virus worldwide and the lack of effective treatment for this infection has led to a rise in the incidence of hepatocellular carcinoma (HCC). Moreover, it is now accepted that the cirrhotic liver, regardless of etiology, is a nidus for tumor formation. A landmark study of 60 patients by Mazzaferro et al, published in 1996, forever changed the way in which surgeons approach this disease. The Milan criteria (one lesion <5 cm or three lesions < 3 cm each) were adopted by the United Network for Organ Sharing in 2002 as the criteria by which patients would be given exception points for liver transplantation for HCC. Resection for HCC in the cirrhotic patient has poor outcomes, and many patients' livers cannot be resected due to underlying portal hypertension and thrombocytopenia. Results of transplantation are excellent, with an 80% 5-year survival. Finally, it has been demonstrated that the use of sirolimus for immunosuppression management in these patients may improve long-term disease-free survival; however, no consensus has been reached across the transplant community.

Multidisciplinary Management of Severe Traumatic Hepatic Injury Involving Interventional Radiology Embolization, Trauma Laparotomy, and Liver Transplantation.

This report describes liver transplantation as a successful strategy in the management of a young man who presented to a local emergency room following catastrophic traumatic hepatic vascular injuries. Expeditious multidisciplinary management, including interventional radiology, trauma surgery, and ultimately transplant surgery, provided the patient with definitive therapy following his injuries and early return to normal activity. Our experience highlights the importance of prompt referral of select hepatic trauma patients for liver transplant evaluation as part of their complex trauma management.

Transplant Hepatectomy With Portacaval Shunt and MARS Therapy for Perioperative Catastrophe: A Series of Four Liver Transplant Cases.

Increased worldwide focus on maximal donor utilization and transplantation of patients once considered too ill to survive liver transplantation may increase the otherwise rare frequency of catastrophic graft failure. Although the deleterious effects of an acutely failing allograft have been established for decades, the optimal strategy in this patient population in the perioperative period remains ill-defined. METHODS: A retrospective review of all liver transplant recipients with perioperative failure leading to transplant hepatectomy between January 1, 2014 and June 30, 2017 was performed. All patients were supported with MARS therapy while awaiting retransplantation. RESULTS: Four patients experienced catastrophic graft failure from massive exsanguination and liver fracture (1), portal vein and hepatic artery thrombosis (1), idiopathic necrosis (1), and necrosis from inadequate donor flushing/primary nonfunction (1). All patients improved following transplant hepatectomy with portacaval shunting. Patients were supported with intubation, vasopressors, renal replacement therapy, and Molecular Adsorbent Recirculating System therapy. All patients underwent retransplantation after a mean anhepatic phase of 48.8 (± 5.13) h. Survival to discharge was 75%. CONCLUSIONS: Although catastrophic liver failure is highly challenging, acceptable outcomes can be achieved with timely hepatectomy with portacaval shunt and retransplantation, particularly in patients supported with the Molecular Adsorbent Recirculating System device.