Incidence of solid organ cancers after liver transplantation: comparison with regional cancer incidence rates and risk factors

Integrating an addiction team into the management of patients transplanted for alcohol-associated liver disease reduces the risk of severe relapse

Background & Aims

Liver transplantation (LT) is a last resort treatment for patients at high risk of mortality from end-stage liver disease. Over the past years, alcohol-associated liver disease has become the most frequent indication for LT in the world. The outcomes of LT for alcohol-associated liver disease are good, but return to alcohol use is detrimental for medium-term survival because of cancer development, cardiovascular events, and recurrent alcohol-associated cirrhosis. Several strategies have been developed to prevent return to alcohol use during the pre- or post-LT period, but there are no specific recommendations. Therefore, the main objective of this study was to investigate if the integration of an addiction team in a LT unit affected the rate of severe alcohol relapse after LT. The secondary objectives were to assess the effects of addiction follow up on cardiovascular events, cancer, and overall survival.

Methods

This study was a retrospective comparison between centres with or without addiction monitoring.

Results

The study included 611 patients of which 79.4% were male with a mean age of 55.4 years at the time of LT, 190 were managed by an integrated addiction team. The overall alcohol relapse rate was 28.9% and the rate of severe relapse was 13.0%. Patients with addiction follow-up had significantly less frequent severe alcohol relapse than those in the control group (p = 0.0218). Addiction follow up (odds ratio = 0.19; p = 0.001) and age at LT (odds ratio = 1.23; p = 0.02) remained significantly associated with post-LT cardiovascular events.

Conclusions

Our study confirms the benefits of integrating an addiction team to reduce return to alcohol use after LT.

Clinical Trials registration

This study is registered at ClinicalTrials.gov (NCT04964687).

Impact and implications

The main indication for liver transplantation is alcohol-associated cirrhosis. There are currently no specific recommendations on the addiction monitoring of transplant candidates, although severe return to alcohol use after liver transplantation has a negative impact on long-term survival of patients. In this study, we explored the impact of a systematic addiction intervention on the return to alcohol use rates. In our transplantation centre, we demonstrated the interest of an addiction follow up to limit the severe alcohol relapses rate. This information should be further investigated in prospective studies to validate these data.

Lung cancer incidences after liver transplantation: A systematic review and meta-analysis

BACKGROUND

Liver transplantation has made significant progress in recent decades. Lung cancer is one of the most frequently occurring cancers after liver transplantation. However, the risk of lung cancer among liver transplant patients compared with the general population is unclear. The aim of this meta-analysis was to assess the risk of developing lung cancer after liver transplantation.

METHODS

All eligible studies published in PubMed, Web of Science, and Embase from database inception to April 2022 were included. Standardized incidence ratio was used to describe the increased risk of lung cancer in liver transplant recipients as compared with the general population. The random-effects model was used for the calculations. A funnel plot and Egger test were performed to assess the potential publication bias.

RESULTS

Our meta-analysis included 15 studies, which involved 76,897 liver transplantation patients. Studies included in this review showed significant heterogeneity (I2  = 65.3%; p < 0.001), which required a random-effects model for effect pooling. The results indicated a significant higher risk of developing lung cancer in liver transplant patients than the general population with a pooled SIR of 2.06 (95% CI: 1.73, 2.46, p < 0.001). When stratified by region, no significant regional difference was observed. It showed a similarly doubled risk of lung cancer in Europe and North America, but an insignificantly increased risk in Asian populations. The sensitivity analysis by removal and substitution of each literature did not change the results.

CONCLUSION

Our meta-analysis suggests that liver transplant patients are twice as likely as the general population to develop lung cancer. Further research on risk factors for the development of lung cancer after liver transplantation should be conducted and appropriate surveillance protocols should be developed to reduce the risk of its occurrence.

Main factors influencing long-term outcomes of liver transplantation in 2022

Liver transplant (LT) outcomes have markedly improved in the recent decades, even if long-term morbidity and mortality are still considerable. Most of late deaths are independent from graft function and different comorbidities, including complications of metabolic syndrome and de novo neoplasms, seem to play a key role in determining long-term outcomes in LT recipients. This review discusses the main factors associated with late mortality and suggests possible strategies to improve long-term management and follow-up after liver transplantation. In particular, the reduction of drug toxicity, the use of tools to identify high-risk patients, and setting up a multidisciplinary team also for long-term management of LT recipients may further improve survival after liver transplantation.

Liver Transplantation in Alcohol-related Liver Disease and Alcohol-related Hepatitis

Alcohol-related liver disease (ARLD) remains one of the leading causes of chronic liver disease and the prevalence of alcohol-related cirrhosis is still increasing worldwide. Thus, ARLD is one of the leading indications for liver transplantation (LT) worldwide especially after the arrival of direct-acting antivirals for chronic hepatitis C infection. Despite the risk of alcohol relapse, the outcomes of LT for ARLD are as good as for other indications such as hepatocellular carcinoma (HCC), with 1-, 5-, and 10- year survival rates of 85%, 74%, and 59%, respectively. Despite these good results, certain questions concerning LT for ARLD remain unanswered, in particular because of persistent organ shortages. As a result, too many transplantation centers continue to require 6 months of abstinence from alcohol for patients with ARLD before LT to reduce the risk of alcohol relapse even though compelling data show the poor prognostic value of this criterion. A recent pilot study even observed a lower alcohol relapse rate in patients receiving LT after less than 6 months of abstinence as long as addictological follow-up is reinforced. Thus, the question should not be whether LT should be offered to patients with ARLD but how to select patients who will benefit from this treatment.

RCAN1-mediated calcineurin inhibition as a target for cancer therapy

Cancer is the leading cause of mortality worldwide. Regulator of calcineurin 1 (RCAN1), as a patent endogenous inhibitor of calcineurin, plays crucial roles in the pathogenesis of cancers. Except for hypopharyngeal and laryngopharynx cancer, high expression of RCAN1 inhibits tumor progression. Molecular antitumor functions of RCAN1 are largely dependent on calcineurin. In this review, we highlight current research on RCAN1 characteristics, and the interaction between RCAN1 and calcineurin. Moreover, the dysregulation of RCAN1 in various cancers is reviewed, and the potential of targeting RCAN1 as a new therapeutic approach is discussed.

Current Status of Malignant Tumors after Organ Transplantation

Objective

To analyze the diagnosis and treatment of patients with concomitant malignant tumors after organ transplantation by compiling data from organ transplantation patients.

Methods

By searching CNKI and PubMed databases, we made a systematic analysis of the studies of postorgan transplantation complicating malignant tumors in the last decade.

Results

There were 10 articles on malignant tumors after renal transplantation, 8 articles on liver transplantation, 2 articles on heart transplantation, and 1 article on lung transplantation. The incidence of malignant tumors complicating renal transplantation is 10.4% in Europe, with skin cancer and Kaposi's sarcoma being common; the incidence in the United States is 3.4%, with PTLD having the highest incidence; the incidence of malignant tumors is relatively lowest in Asia, with gastrointestinal malignancies being the main ones. The mean time to complication of malignancy after renal transplantation is 3.83 years. The incidence of concurrent malignancies after liver transplantation is 8.8% in Europe, where skin cancer and Kaposi's sarcoma are common; 5.6% in Asia, where gastrointestinal tract tumors are prevalent; and 4.5% in the United States, where gastrointestinal tract tumors, PTLD, and hematologic diseases are predominant. The mean time to complication of malignancy after liver transplantation is 4.79 years. The incidence of malignancy after heart transplantation is 6.8-10.7%. The incidence of malignancy after lung transplantation is about 10.1%. Minimization of immunosuppression or modification of immunosuppression regimens may be a key component of cancer prevention. mTOR inhibitors and phenolate (MMF) reduce the incidence of de novo malignancies in patients after solid organ transplantation. Surgical treatment improves survival in patients with early malignancies. The use of external beam radiation therapy in the treatment of hepatocellular carcinoma is limited due to the risk of radiation liver disease.

Conclusions

The risk of concomitant malignancy needs to be guarded for 5 years of immunosuppressive therapy after organ transplantation surgery. Adjusting the immunosuppressive treatment regimen is an effective way to reduce concurrent malignancies. Systemic chemotherapy or radiotherapy requires vigilance against the toxic effects of drug metabolism kinetics on the transplanted organ.

Cumulative incidence of solid and hematological De novo malignancy after liver transplantation in a multicentre cohort

BACKGROUND

Recent innovations in the field of liver transplantation have led to a wealth of new treatment regimes, with potential impact on the onset of de novo malignancies (DNM). The aim of this multicenter cohort study was to provide contemporary figures for the cumulative incidences of solid and hematological DNM after liver transplantation.

METHODS

We designed a retrospective cohort study including patients undergoing LT between 2000 and 2015 in three Italian transplant centers. Cumulative incidence was calculated by Kaplan-Meyer analysis.

RESULTS

The study included 789 LT patients with a median follow-up of 81 months (IQR: 38-124). The cumulative incidence of non-cutaneous DNM was 6.2% at 5-years, 11.6% at 10-years and 16.3% at 15-years. Post-Transplant Lymphoproliferative Disorders (PTLD) were demonstrated to have a cumulative incidence of 1.0% at 5-years, 1.6% at 10-years and 2.2% at 15-years. Solid Organ Tumors (SOT) demonstrated higher cumulative incidences - 5.3% at 5-years, 10.3% at 10-years and 14.4% at 15-years. The most frequently observed classifications of SOT were lung (rate 1.0% at 5-years, 2.5% at 10-years) and head & neck tumors (rate 1.3% at 5-years, 1.9% at 10-years).

CONCLUSIONS

Lung tumors and head & neck tumors are the most frequently observed SOT after LT.

Targeting T-type channels in cancer: What is on and what is off?

Over the past 20 years, various studies have demonstrated a pivotal role of T-type calcium channels (TTCCs) in tumor progression. Cytotoxic effects of TTCC pharmacological blockers have been reported in vitro and in preclinical models. However, their roles in cancer physiology are only beginning to be understood. In this review, we discuss evidence for the signaling pathways and cellular processes stemming from TTCC activity, mainly inferred by inverse reasoning from pharmacological blocks and, only in a few studies, by gene silencing or channel activation. A thorough analysis indicates that drug-induced cytotoxicity is partially an off-target effect. Dissection of on/off-target activity is paramount to elucidate the physiological roles of TTCCs, and to deliver efficacious therapies suited to different cancer types and stages.

Review of Standardized Incidence Ratios (SIR) of non-lymphoid de novo malignancies after liver transplantation: Structured analysis of global differences

INTRODUCTION

De Novo malignancy after liver transplantation (LTx) is the second most common cause of death in adult LTx recipients. The current report identifies differences in Standardized Incidence Ratios (SIR) for various non-lymphoid de novo malignancies by comparing and analyzing post LTx SIR for non-lymphoid de novo malignancies.

MATERIAL AND METHODS

A thorough search of PubMed and Web of Science databases was conducted; 25 publications describing de novo malignancies post-LTx with SIR were identified.

RESULTS

Overall SIR varied from 1.4 to 11.6 (median 2.4). Oropharyngeal/larynx (OPL), lung, colo-rectal, and kidney malignancies were more prevalent with higher SIR (median = 4.4, 1.9, 2.67, 2.5, respectively). Breast and prostate malignancies were also more prevalent with lower SIR (median = 0.9, 1.0, respectively). Pancreatic, central nervous system (CNS), melanoma, rare cancers and Kaposi's sarcoma were less prevalent (except in Italy and Sweden) but had much higher SIR (median = 2.6, 2.4, 2.02, 22.5 and 53.6, respectively). The overall higher SIR values are related to the age of the recipient, length of follow-up, the grouping of different organ systems, inclusion or exclusion of epidermal non-malacotic skin cancers, lymphoid malignancy, and occurrence of rare malignancies including Kaposi's sarcoma.

CONCLUSION

OPL, lung, gastrointestinal, kidney, and bladder malignancies were more prevalent with higher SIR. Breast and prostate cancers were more prevalent with lower SIR. Pancreatic, CNS, melanoma, rare cancers and Kaposi's sarcoma were less prevalent with higher SIR. Age of the recipients, length of follow-up, and rare cancer types influence overall SIR values with some global differences.

Risk factors of de novo malignancies after liver transplantation: a French national study on 11004 adult patients

BACKGROUND

After liver transplantation (LT),de novo malignancies are one of the leading causes of late mortality. The aim of the present retrospective study was to identify the risk factors of de novo malignancies in a large cohort of LT recipients in France, using Fine and Gray competing risks regression analysis.

METHODS

The study population consisted in 11004 adults transplanted between 2000 and 2013, who had no history of pre-transplant malignancy, except primary liver tumor. A Cox model adapted to the identification of prognostic factors (competitive risks) was used.

RESULTS

From the entire cohort, one (or more)de novo malignancy was reported in 1480 L T recipients (13.45%). The probability to develop a de novo malignancy after LT was 2.07% at 1 year, 13.30% at 5 years, and 28.01% at 10 years. Of the known reported malignancies, the most common malignancies were hematological malignancy (22.36%), non-melanoma skin cancer (19.53%) and lung cancer (12.36%). According to Fine and Gray competing risks regression multivariate analysis, were significant risk factors for post-LT de novo malignancy: recipient age (Subdistribution Hazard Ratio (SHR) = 1.03 95%CI 1.03-1.04), male gender (SHR = 1.45 95%CI 1.27-1.67), non-living donor (SHR = 1.67 95%CI 1.14-2.38), a first LT (SHR = 1.35 95%CI 1.09-1.69) and the type of initial liver disease (alcohol-related liver disease (SHR = 1.63 95%CI 1.22-2.17), primary sclerosing cholangitis (SHR = 1.98 95%CI 1.34-2.91), and primary liver tumor (SHR = 1.88 95%CI 1.41-2.54)). Initial immunosuppressive regimen had no significant impact.

CONCLUSION

The present study confirms that LT recipient characteristics are associated with the risk ofde novo malignancy and this underlines the need for personalized screening in order to improve survival.

Hepatocellular carcinoma and the risk of de novo malignancies after liver transplantation - a multicenter cohort study

Patients with hepatocellular carcinoma (HCC) are at high risk of second primary malignancies. As HCC has become the leading indication of liver transplant (LT), the aim of this study was to investigate whether the presence of HCC before LT could influence the onset of de novo malignancies (DNM). A cohort study was conducted on 2653 LT recipients. Hazard ratios (HR) of DNM development for patients transplanted for HCC (HCC patients) were compared with those of patients without any previous malignancy (non-HCC patients). All models were adjusted for sex, age, calendar year at transplant, and liver disease etiology. Throughout 17 903 person-years, 6.6% of HCC patients and 7.4% of non-HCC patients developed DNM (202 cases). The median time from LT to first DNM diagnosis was shorter for solid tumors in HCC patients (2.7 vs 4.5 years for HCC and non-HCC patients, respectively, P < 0.01). HCC patients were at a higher risk of bladder cancer and skin melanoma. There were no differences in cumulative DNM-specific mortality by HCC status. This study suggests that primary HCC could be a risk factor for DNM in LT recipients, allowing for risk stratification and screening individualization.

Current Challenges in the Post-Transplant Care of Liver Transplant Recipients in Germany

Improving long-term patient and graft survival after liver transplantation (LT) remains a major challenge. Compared to the early phase after LT, long-term morbidity and mortality of the recipients not only depends on complications immediately related to the graft function, infections, or rejection, but also on medical factors such as de novo malignancies, metabolic disorders (e.g., new-onset diabetes, osteoporosis), psychiatric conditions (e.g., anxiety, depression), renal failure, and cardiovascular diseases. While a comprehensive post-transplant care at the LT center and the connected regional networks may improve outcome, there is currently no generally accepted standard to the post-transplant management of LT recipients in Germany. We therefore described the structure and standards of post-LT care by conducting a survey at 12 German LT centers including transplant hepatologists and surgeons. Aftercare structures and form of cost reimbursement considerably varied between LT centers across Germany. Further discussions and studies are required to define optimal structure and content of post-LT care systems, aiming at improving the long-term outcomes of LT recipients.

Prognostic value of endogenous and exogenous metabolites in liver transplantation

Liver transplantation has been widely accepted as an effective intervention for end-stage liver diseases and early hepatocellular carcinomas. However, a variety of postoperative complications and adverse reactions have baffled medical staff and patients. Currently, transplantation monitoring relies primarily on nonspecific biochemical tests, whereas diagnosis of multiple complications depends on invasive pathological examination. Therefore, a noninvasive monitoring method with high selectivity and specificity is desperately needed. This review summarized the potential of endogenous small-molecule metabolites as biomarkers for assessing graft function, ischemia-reperfusion injury and liver rejection. Exogenous metabolites, mainly those immunosuppressive agents with high intra- and inter-individual variability, were also discussed for transplantation monitoring.

Alcohol and other substance use after liver transplant

In this article we tackle the controversial subject of alcohol and other substance use following liver transplantation (LT). Most of the literature on and importance of this topic pertains not to recreational use of alcohol or substances but to patients who have alcohol or substance use disorders (AUDs/SUDs). To understand these behaviors after such a lifesaving and resource-intensive procedure as LT necessitates an understanding of these disorders as chronic medical diseases. It also requires an awareness that management of these disorders begins before transplant, so we will briefly touch on considerations to prepare patients for the transplantation. Additionally, we review not only the rates of alcohol and substance use post-LT but strategies clinicians could adopt to identify and manage these events post-LT. Thus, we will summarize approaches for monitoring use and a range of therapeutic treatment options, including pharmacotherapy, to employ once use is discovered. While clinical gastroenterologists may be the primary clinicians responsible for the care of LT recipients, we emphasize a multidisciplinary team approach which, especially for the behavioral health components of the treatment, is likely to be the most successful. This article concludes with a summary of recommendations for clinicians working with these patients and possible future directions for both clinical care and research. While the bulk of the literature is on LT in the context of AUD, we review the smaller body of literature available on non-alcohol substance use.

De novo malignancies after liver transplantation: The effect of immunosuppression-personal data and review of literature

BACKGROUND

Immunosuppression has undoubtedly raised the overall positive outcomes in the post-operative management of solid organ transplantation. However, long-term exposure to immunosuppression is associated with critical systemic morbidities. De novo malignancies following orthotopic liver transplants (OLTs) are a serious threat in pediatric and adult transplant individuals. Data from different experiences were reported and compared to assess the connection between immunosuppression and de novo malignancies in liver transplant patients.

AIM

To study the role of immunosuppression on the incidence of de novo malignancies in liver transplant recipients.

METHODS

A systematic literature examination about de novo malignancies and immunosuppression weaning in adult and pediatric OLT recipients was described in the present review. Worldwide data were collected from highly qualified institutions performing OLTs. Patient follow-up, immunosuppression discontinuation and incidence of de novo malignancies were reported. Likewise, the review assesses the differences in adult and pediatric recipients by describing the adopted immunosuppression regimens and the different type of diagnosed solid and blood malignancy.

RESULTS

Emerging evidence suggests that the liver is an immunologically privileged organ able to support immunosuppression discontinuation in carefully selected recipients. Malignancies are often detected in liver transplant patients undergoing daily immunosuppression regimens. Post-transplant lymphoproliferative diseases and skin tumors are the most detected de novo malignancies in the pediatric and adult OLT population, respectively. To date, immunosuppression withdrawal has been achieved in up to 40% and 60% of well-selected adult and pediatric recipients, respectively. In both populations, a clear benefit of immunosuppression weaning protocols on de novo malignancies is difficult to ascertain because data have not been specified in most of the clinical experiences.

CONCLUSION

The selected populations of tolerant pediatric and adult liver transplant recipients greatly benefit from immunosuppression weaning. There is still no strong clinical evidence on the usefulness of immunosuppression withdrawal in OLT recipients on malignancies. An interesting focus is represented by the complete reconstitution of the immunological pathways that could help in decreasing the incidence of de novo malignancies and may also help in treating liver transplant patients suffering from cancer.

Tacrolimus exposure after liver transplantation for alcohol-related liver disease: Impact on complications

BACKGROUND

Alcohol-related liver disease (ALD) is one of the main indications for liver transplantation (LT). For 20 years, tacrolimus (Tac) is the cornerstone immunosuppressive drug used after LT and is very efficient for the prevention of rejection. Nevertheless, the major drawback of long-term use of Tac is the risk for developing dose-dependent adverse effects.

OBJECTIVE

The aim of the present study was to assess the impact of Tac exposure (trough concentrations and concentration/dose (C/D) ratio) during the first year after LT, on short- and long-term complications after LT for ALD.

METHODS

All patients who underwent a LT for ALD at Lyon Edouard Herriot Hospital from October 1990 to September 2010, and who were treated with Tac for at least one year after LT, were analyzed.

RESULTS

The study population consisted in 251 patients, mean age 53.4 ± 7.3 years, and followed during 11.6 ± 4.8 years. Post-LT complications included severe infectious events (44.6%), malignancies (41.4%), arterial hypertension (49.4%) dyslipidemia (44.2%), diabetes (18.7%) and cardiovascular events (15.5%). De novo hypertension, cardiovascular event, CMV infection, non-melanoma skin cancers and HCC recurrence after transplantation were significantly associated with higher Tac trough blood concentration. In addition, Tac fast-metabolizers (defined as C/D < 1.8) had significantly more impaired renal function at 1, 5, and 10 years and more cardiovascular events, PTLD, diabetes and hypertension than slow-metabolizers.

CONCLUSION

Our results strongly support that, in addition to blood trough concentrations, Tac metabolism, as estimated by the simple C/D ratio, could be an efficient parameter in daily practice to identify LT patients at risk to develop long term general complications of Tac.

Long-term care of transplant recipients: de novo neoplasms after liver transplantation

PURPOSE OF REVIEW

Since the first liver transplantation in the early 1960s, there have been significant improvements in the recipients' long-term outcome. Patients who have undergone transplantation are exposed to a high risk of developing neoplastic disease, not only because of their chronic immunosuppression, but also related to physiological aging, lifestyle, chronic viral infections, liver disease cause, and carcinogenic immunosuppressants. The present review covers the latest and most relevant data on de novo neoplasms after liver transplantation, and discusses their implications for clinical practice.

RECENT FINDINGS

Given the impact of de novo neoplasms, in terms of morbidity and mortality, transplant teams must be prepared to diagnose and treat these conditions promptly. Dedicated cancer screening protocols are warranted. Although surveillance strategies are based on data concerning the general population, they should be customized in the light of each transplant recipient's risk factors. The resulting risk stratification is crucially important to the design of early intervention programs, and for addressing the modulation of individualized immunosuppressive regimens.

SUMMARY

De novo malignancies are a significant issue for the liver transplant population, but targeted screening programs have shown that survival rates similar to those of nonimmunosuppressed patients can be achieved. New oncological surveillance strategies covering the prophylaxis, monitoring, and treatment of de novo neoplasms should take high priority in clinical research.

Effects of Smoking on Solid Organ Transplantation Outcomes

Tobacco smoking is the leading preventable cause of death worldwide. Both donor and recipient smoking have been shown to increase graft loss and mortality in solid organ transplant recipients in many studies. Only in lung transplants is smoking a universal contraindication to transplantation. Transplant centers implement different policies regarding smoking recipients and allografts from smoking donors. Due to scarcity of available allografts, the risks of smoking have to be weighed against the risks of a longer transplant waitlist period. Although transplant centers implement different strategies to encourage smoking cessation pre- and post-transplant, not many studies have been published that validate the efficacy of smoking cessation interventions in this vulnerable population. This article summarizes the results of studies investigating prevalence, impact on outcomes, and cessationinterventions for smoking in the transplant population. We report herein a review of the elevated risks of infection, malignancy, graft loss, cardiovascular events, and mortality in solid organ transplant populations.

Age and liver transplantation

The average age of liver transplant donors and recipients has increased over the years. Independent of the cause of liver disease, older candidates have more comorbidities, higher waitlist mortality and higher post-transplant mortality than younger patients. However, transplant benefit may be similar in older and younger recipients, provided older recipients are carefully selected. The cohort of elderly patients transplanted decades ago is also increasingly raising issues concerning long-term exposure to immunosuppression and aging of the transplanted liver. Excellent results can be achieved with elderly donors and there is virtually no upper age limit for donors after brain death liver transplantation. The issue is how to optimise selection, procurement and matching to ensure good results with elderly donors. The impact of old donor age is more pronounced in younger recipients and patients with a high model for end-stage liver disease score. Age matching between the donor and the recipient should be incorporated into allocation policies with a multistep approach. However, age matching may vary depending on the objectives of different allocation policies. In addition, age matching must be revisited in the era of direct-acting antivirals. More restrictive limits have been adopted in donation after circulatory death. Perfusion machines which are currently under investigation may help expand these limits. In living donor liver transplantation, donor age limit is essentially guided by morbidity related to procurement. In this review we summarise changing trends in recipient and donor age. We discuss the implications of older age donors and recipients. We also consider different options for age matching in liver transplantation that could improve outcomes.

Colorectal Cancer Characteristics and Outcomes after Solid Organ Transplantation

Background

Individuals after solid organ transplant may develop secondary malignancies. In our clinical practice, we noted an increasing number of individuals who developed colorectal cancers after solid organ transplantation. The primary aim of this study was to describe the characteristics and outcomes of the patients who developed colorectal cancer after solid organ transplant.

Materials and Methods

Data was gathered and merged from several registries at Mayo Clinic to identify all patients who received a diagnosis of colon or rectal cancer and solid organ transplant. Continuous variables were summarized as mean (standard deviation) and median (range), while categorical variables were reported as frequency (percentage). Time to colorectal cancer after transplant and overall survival after cancer diagnosis were estimated using Kaplan-Meier method.

Results

Initially, 115 colorectal cancer patients who also had a transplant were identified. The diagnosis of colorectal cancer was noted after solid organ transplant in 63 patients. The mean age at transplant was 57 years. Majority had received a kidney transplant (44.4%) followed by liver (36.5%). The median time to develop colorectal cancer was 59.3 months (range: 4.4-251.4 months). 15 (24.6%) were stage 4 at diagnosis and 13 (21.3%) had stage 3 colorectal cancer. Median overall survival was 30.8 months; 5-, 10- and 15-year survival were noted to be 42.5%, 17.9%, and 7.5%, respectively. None of the stage 4 patients were alive at 5 years; 5-year survival rate for stage 1, 2, and 3 patients was 77%, 50%, and 42%, respectively.

Conclusions

Our study reports on one of the largest cohorts of patients of colorectal cancer that developed the cancer after solid organ transplant. Survival is extremely poor for advanced cases. However, long-term survivors are noted who developed the cancer at a relatively early stage. Colorectal screening recommendations may need to be revised for patients after solid organ transplant.

Incidence and outcome of colorectal cancer in liver transplant recipients: A national, multicentre analysis on 8115 patients

BACKGROUND & AIMS

De novo malignancies after liver transplantation represent one of the leading causes of death in the long-term. It remains unclear whether liver transplant recipients have an increased risk of colorectal cancer and whether this negatively impacts on survival, particularly in those patients affected by primary sclerosing cholangitis and ulcerative colitis.

METHODS

In this national multicentre cohort retrospective study, the incidence of colorectal cancer in 8115 evaluable adult patients undergoing a liver transplantation between 1 January 1990 and 31 December 2010 was compared to the incidence in the general population through standardised incidence ratios.

RESULTS

Fifty-two (0.6%) cases of colorectal cancer were identified at a median of 5.6 years postliver transplantation, predominantly grade 2 (76.9%) and stage T3 (50%) at diagnosis. The incidence rate of colorectal cancer in the whole liver transplant population was similar to the general UK population (SIR: 0.92), but significantly higher (SIR: 7.0) in the group of patients affected by primary sclerosing cholangitis/ulcerative colitis. One-, five- and ten-year survival rates from colorectal cancer diagnosis were 71%, 48% and 31%, respectively, and the majority of colorectal cancer patients died of cancer-specific causes.

CONCLUSIONS

Liver transplantation alone is not associated with an increased risk of colorectal cancer development. The primary sclerosing cholangitis/ulcerative colitis liver transplant population showed a significantly higher risk of colorectal cancer development than the general population, with a high proportion of advanced stage at diagnosis and a reduced patient survival.

De Novo Head and Neck Cancer After Liver Transplant With Antibody-Based Immunosuppression Induction

BACKGROUND

Powerful antibody-based immunosuppression induction is now used routinely during organ transplantation and may place patients at even higher risk of post-transplant cancer.

MATERIALS AND METHODS

Incidence of de novo head and neck cancer was extracted from the records of 1685 consecutive adult deceased donor liver transplant recipients with a minimum 1-year follow-up from 2001 to 2015. There were 121 patients positively identified as having developed de novo head and neck cancer post-liver transplant. Records of these patients were analyzed to determine demographics, history of cancer pre-liver transplant, de novo cancer type and location, treatment modalities, and alcohol and tobacco exposure.

RESULTS

Of the 121 patients who developed cancer of the head and neck (7%), there were 103 cutaneous (6%) and 25 noncutaneous (1%). For noncutaneous cancers, factors associated with increased risk of cancer included alcohol abuse (P < .001), any smoking history (P = .05), and increasing exposure to tobacco (P < .01). Ten-year Cox regression patient survival demonstrates a survival disadvantage for patients who develop noncutaneous cancer (P  = .06) but a survival advantage for patients who develop cutaneous cancer (P < .01).

CONCLUSIONS

The incidence and pattern of head and neck cancer in this population of liver transplant recipients was similar to those published previously, suggesting that induction immunosuppression does not increase risk of these types of cancers. Long-term survival was worse for patients with noncutaneous cancers, but better for those with cutaneous cancers, though the reason is unclear.

Longterm Risk of Solid Organ De Novo Malignancies After Liver Transplantation: A French National Study on 11,226 Patients

De novo malignancies are one of the major late complications and causes of death after liver transplantation (LT). Using extensive data from the French national Agence de la Biomédecine database, the present study aimed to quantify the risk of solid organ de novo malignancies (excluding nonmelanoma skin cancers) after LT. The incidence of de novo malignancies among all LT patients between 1993 and 2012 was compared with that of the French population, standardized on age, sex, and calendar period (standardized incidence ratio; SIR). Among the 11,226 LT patients included in the study, 1200 de novo malignancies were diagnosed (10.7%). The risk of death was approximately 2 times higher in patients with de novo malignancy (48.8% versus 24.3%). The SIR for all de novo solid organ malignancies was 2.20 (95% confidence interval [CI], 2.08-2.33). The risk was higher in men (SIR = 2.23; 95% CI, 2.09-2.38) and in patients transplanted for alcoholic liver disease (ALD; SIR = 2.89; 95% CI, 2.68-3.11). The cancers with the highest excess risk were laryngeal (SIR = 7.57; 95% CI, 5.97-9.48), esophageal (SIR = 4.76; 95% CI, 3.56-6.24), lung (SIR = 2.56; 95% CI, 2.21-2.95), and lip-mouth-pharynx (SIR = 2.20; 95% CI, 1.72-2.77). In conclusion, LT recipients have an increased risk of de novo solid organ malignancies, and this is strongly related to ALD as a primary indication for LT.

Risk of virus and non-virus related malignancies following immunosuppression in a cohort of liver transplant recipients. Italy, 1985-2014

This cohort study assessed, in Italy, the overall pattern of risk of de novo malignancies following liver transplantation (LT). The study group included 2,832 individuals who underwent LT between 1985 and 2014 in nine centers all over Italy. Person-years (PYs) at cancer risk were computed from 30 days after LT to the date of cancer diagnosis, to the date of death or to the end of follow-up. Excess cancer risk, as compared to the general population, was estimated using standardized incidence ratios (SIRs) and 95% confidence intervals (CIs). During 18,642 PYs, 246 LT recipients developed 266 de novo malignancies, corresponding to a 1.8-fold higher cancer risk (95% CI: 1.6-2.0). SIRs were particularly elevated for virus-related malignancies, including Kaposi's sarcoma (SIR = 53.6, 95% CI: 30.0-88.5), non-Hodgkin lymphomas (SIR = 7.1, 95% CI: 4.8-10.1) and cervix uteri (SIR = 5.4, 95% CI: 1.1-15.8). Among virus-unrelated malignancies, elevated risks emerged for head and neck (SIR = 4.4, 95% CI: 3.1-6.2), esophagus (SIR = 6.7, 95% CI: 2.9-13.3) and adrenal gland (SIR = 22.9, 95% CI: 2.8-82.7). Borderline statistically significant elevated risks were found for lung cancer (SIR = 1.4, 95% CI: 1.0-2.1) and skin melanoma (SIR = 2.6, 95% CI: 1.0-5.3). A reduced risk emerged for prostate cancer (SIR = 0.1, 95% CI: 0.0-0.5). These findings underline the need of preventive interventions and early detection of malignancies, specifically tailored to LT recipients.

Current Knowledge on Skin Cancer Prevention in Liver Transplant Recipients

The improved survival of liver transplant recipients (LTRs) has been accompanied by a concomitant rise in long-term liver transplantation complications, including skin cancer. A recent study found that the prevalence of skin cancer among LTRs is 13.5%, a rate equivalent to that observed among kidney transplant recipients. Given the morbidity associated with skin cancer in LTRs, an individualized, multidisciplinary approach to skin cancer prevention that incorporates patient education, encourages consistent use of primary prevention methods, and ensures routine dermatologic screening should be universally adopted in this population. Chemopreventative measures should be considered in LTRs with a high skin cancer burden. Furthermore, additional studies should be performed in order to systematize these recommendations.

Analysis of Causes and Risk Factors for Late Mortality After Liver Transplant: How Can We Obtain Better Long-Term Survival?

OBJECTIVES

We investigated late mortality causes and risk factors in patients who were undergoing deceased-donor liver transplant.

MATERIALS AND METHODS

Patients who had deceased-donor liver transplant from February 1997 to June 2014 in the hepatopancreaticobiliary surgery and liver transplant unit at Dokuz Eylul University Hospital were analyzed. Inclusion criteria were patients over 18 years of age and who survived more than 1 year after liver transplant. Causes of mortality and related risk factors after the first year were analyzed.

RESULTS

Of the 157 included patients, 102 patients (72%) received transplant procedures for hepatitis B and C secondary to chronic liver disease. Mean follow-up was 89.85 months (range, 14.4-240 months). Of 157 patients, 20 patients (12.7%) died: 12 patients (60%) died during posttransplant years 2-5 and 8 patients (40%) died after 5 years. Causes of death included malignancy in 8 patients (40%), recurrent hepatitis C infection in 3 patients (15%), infection in 3 patients (15%), coronary artery disease in 2 patients (10%), graft rejection in 2 patients (10%), and biliary complications in 2 patients (10%). Univariate analyses showed that long-term survival was significantly lower in patients older than 50 years (P = .001), when there was presence of hepatocellular carcinoma (P = .011), and when donor age was higher than 38 years (P = .045). Multivariate analyses identified recipient age (P = .007) and presence of hepatocellular carcinoma (P = 0.033) as factors that reduced long-term survival.

CONCLUSIONS

The main causes of late mortality in liver transplant are malignancy, recurrence of hepatitis C, infection, coronary artery disease, graft rejection, and biliary complications. Advanced age and hepatocellular carcinoma are independent risk factors that increase late mortality.

Decreasing incidence of cancer after liver transplantation-A Nordic population-based study over 3 decades

Cancer remains one of the most serious long-term complications after liver transplantation (LT). Data for all adult LT patients between 1982 and 2013 were extracted from the Nordic Liver Transplant Registry. Through linkage with respective national cancer-registry data, we calculated standardized incidence ratios (SIRs) based on country, sex, calendar time, and age-specific incidence rates. Altogether 461 cancers were observed in 424 individuals of the 4246 LT patients during a mean 6.6-year follow-up. The overall SIR was 2.22 (95% confidence interval [CI], 2.02-2.43). SIRs were especially increased for colorectal cancer in recipients with primary sclerosing cholangitis (4.04) and for lung cancer in recipients with alcoholic liver disease (4.96). A decrease in the SIR for cancers occurring within 10 years post-LT was observed from the 1980s: 4.53 (95%CI, 2.47-7.60), the 1990s: 3.17 (95%CI, 2.70-3.71), to the 2000s: 1.76 (95%CI, 1.51-2.05). This was observed across age- and indication-groups. The sequential decrease for the SIR of non-Hodgkin lymphoma was 25.0-12.9-7.53, and for nonmelanoma skin cancer 80.0-29.7-10.4. Cancer risk after LT was found to be decreasing over time, especially for those cancers that are strongly associated with immunosuppression. Whether immunosuppression minimization contributed to this decrease merits further study.

Risk Factors and Outcomes of De Novo Cancers (Excluding Nonmelanoma Skin Cancer) After Liver Transplantation for Primary Sclerosing Cholangitis

BACKGROUND

Patients with primary sclerosing cholangitis (PSC) may be at higher risk of malignancy after liver transplantation (LT) compared to other LT recipients. We aimed to determine the cumulative incidence of/risk factors for long-term cancer-related mortality in patients with PSC after LT.

METHODS

All adult patients underwent LT for PSC without cholangiocarcinoma from 1984 to 2012, with follow-up through June 2015. We estimated cumulative incidence, risk factors, and mortality from de novo malignancies after LT.

RESULTS

Two hundred ninety-three patients were identified (mean [SD] age, 47 [12] years; 63.3% males; 2.4% smoking at LT). Over a median of 11.5 years (range, 6.4-18.6 years), 64 patients (21.8%) developed 73 nonskin cancers, including 46 solid-organ cancers (renal, 11; colorectal, 11; prostate, 7; breast, 5; pancreas, 5; ovarian/endometrial/vulvar cancers, 3; and de novo cholangiocarcinoma, 4). Twenty-two patients developed hematologic malignancies (posttransplant lymphoproliferative diseases, 18; Hodgkin disease, 2; and myelodysplastic syndrome, 2). Five patients developed melanoma. The 1-, 5-, 10-, and 20-year cumulative incidences of cancer were 2.1%, 8.6%, 18.7%, and 27%, respectively. Mortality of patients with PSC who developed cancer was higher than that of patients with PSC without cancer (hazard ratio, 2.2; P < 0.01). On multivariate analysis, recipient's age and elevated pre-LT international normalized ratio were associated with increased risk of de novo (nonskin) malignancy.

CONCLUSION

The 10-year cumulative risk of cancer after LT for advanced-stage PSC was 18.7%, with posttransplant lymphoproliferative diseases, colorectal cancer, and renal cell cancer being the most common. Post-LT de novo nonskin cancer decreased overall posttransplant survival. Only recipient's age and elevated international normalized ratio at LT were associated with increased nonskin cancer risk.

Addictive behaviors in liver transplant recipients: The real problem?

Liver transplantation (LT) is the gold standard treatment for end-stage liver disease. Whatever the primary indication of LT, substance abuse after surgery may decrease survival rates and quality of life. Prevalence of severe alcohol relapse is between 11 and 26%, and reduces life expectancy regardless of the primary indication of LT. Many patients on waiting lists for LT are smokers and this is a major risk factor for both malignant tumors and cardiovascular events post-surgery. The aim of this review is to describe psychoactive substance consumption after LT, and to assess the impact on liver transplant recipients. This review describes data about alcohol and illicit drug use by transplant recipients and suggests guidelines for behavior management after surgery. The presence of an addiction specialist in a LT team seems to be very important.

Impact of cigarette smoking on early complications after liver transplantation: A single-center experience and a meta-analysis

BACKGROUND

While studies have shown that cigarette smoking has negative implications on the long-term outcome following liver transplantation, its role in early complications is inconclusive.

METHODS

The clinical data of 162 consecutive adult patients who underwent elective liver transplantation from January, 2012 to March, 2016 were analyzed. Patients were defined as active smokers, ex-smokers, or non-smokers on the basis of documentation at the time of liver transplantation. The overall complications following liver transplantation were expressed as the comprehensive complication index (CCI). The specific complications such as the incidence of hepatic artery thrombosis, biliary complications, acute kidney injury were also assessed. A meta-analysis was carried out based on results from the present study and 11 published studies.

RESULTS

We found that cigarette smoking was not associated with higher CCI scores and smokers did not have a higher risk for developing hepatic artery thrombosis, biliary complications, acute kidney injury after liver transplantation. Meta-analysis confirmed the null association between cigarette smoking and an increased incidence of hepatic artery thrombosis or biliary complications in liver transplant recipients. However, the pooled results showed a significantly higher risk of cardiovascular diseases and de-novo malignancies in smokers following liver transplantation.

CONCLUSION

There is not enough evidence supporting an association between cigarette smoking and early mortality and morbidity after liver transplantation. However, smokers should still be encouraged to quit before and after liver transplantation due to the long-term health benefits of smoking cessation.

Alcohol use and smoking after liver transplantation; complications and prevention

The last thirty years have been very prosperous in the field of liver transplantation (LT), with great advances in organ conservation, surgical techniques, peri-operative management and long-term immunosuppression, resulting in improved patient and graft survival rates as well as quality of life. However, substance addiction after LT, namely alcohol and tobacco, results in short term morbidity together with medium and long-term mortality. The main consequences can be vascular (increased risk of hepatic artery thrombosis in smokers), hepatic (recurrent alcoholic cirrhosis in alcohol relapsers) and oncological (increased risk of malignancy in patients consuming tobacco and/or alcohol after LT). This issue has thus drawn attention in the field of LT research. The management of these two at-risk behaviors addictions need the implication of hepatologists and addiction specialists, before and after LT. This review will summarize our current knowledge in alcohol use and cigarette smoking in the setting of LT, give practical tools for identification of high risk patients and treatment options.

Rapid Disease Progression of Liver Metastases following Resection in a Liver-Transplanted Patient with Probable Lynch Syndrome – A Case Report and Review of the Literature

Solid organ transplantation provides life-saving therapy for patients with end-stage organ disease, and its outcomes have been improving dramatically over the past few decades. However, substantial morbidity results from chronic immunosuppressive therapy administered to prevent graft rejection. It predisposes patients to several life-threatening complications, such as opportunistic microbial infections and the development of different types of cancers. Here, we presented the case of a young man with probable Lynch syndrome, who developed an aggressive colon carcinoma after long-term immunosuppressive therapy due to a prior liver transplantation. Based on this case report, we attempt to find an answer to the question about the risk of cancer development or recurrence in patients with familial syndromes receiving long-term immunosuppressive therapy and to find out how it can be minimized. Answering these questions is particularly important, given the facts that disease course is substantially more aggressive among transplanted patients and that prognosis is poor due to lack of immunocompetence, especially in the setting of Lynch syndrome.

Why do patients die after a liver transplantation?

BACKGROUND

As more patients achieve long-term survival, it has become important to understand mortality in liver transplantation (LT) recipients.

METHODS

We conducted retrospective reviews of long-term outcome in two adult LT cohorts: 85 031 in the United Network for Organ Sharing (UNOS) database and 1458 transplanted at the University of Wisconsin (UW).

RESULTS

During median follow-up of 3.2 years (UNOS) and 6.6 years (UW), 35.1% of UNOS patients and 44.2% of UW patients died; 43.1% of all UNOS deaths occurred in year 1 compared to 25.1% in the UW cohort. Deaths due to infection (other than viral hepatitis) or cardiovascular (CV) causes were most frequent in year 1 in both cohorts and then persisted at lower rates. In contrast, death from malignancy increased after year 1 to peak in years 1-5. Deaths due to rejection, hepatitis, or graft failure were infrequent. In the UW cohort, de novo malignancy was more common than recurrent tumor and correlated with smoking history.

CONCLUSIONS

A coordinated holistic approach that focuses on limiting immunosuppression, infection, risky behaviors, and CV risks, while screening for cancer, is needed to extend the healthy lives of LT recipients.

Menopause in women with chronic immunosuppressive treatment - how to help those patients

Women after organ transplantation with chronic immunosuppressive therapy or after bone marrow transplantation without such therapy are a growing group of patients. Although their problems in the peri- and postmenopausal period are the same as in healthy women, due to the primary disease and treatment applied they represent a huge challenge from the point of view of their hormonal treatment of menopause. Transplanted women have no particular contraindications for hormonal therapy use. General contraindications, however, such as arterial hypertension, thrombosis in medical history, diabetes, endometriosis, myomas, or active neoplastic disease, have a higher incidence in this group of patients than in healthy women, which significantly influences the possibility of using hormonal therapy. On the other hand, taking into consideration the predisposition for premature menopause in this group, in combination with chronic immunosuppression, it predisposes these patients for higher cardiovascular disease incidence and bone density loss, so hormonal therapy would be highly advisable. Therapy management in transplanted patients requires special care and close monitoring of the transplanted organ. Saving lives with organ transplantation is one of the greatest achievements of contemporary medicine. For long-term improvement of their quality of life, emphasis should be put on regular diagnostic examinations, early detection of abnormalities, and introduction of effective treatment.

Solid, non-skin, post-liver transplant tumors: Key role of lifestyle and immunosuppression management

Liver transplantation has been the treatment of choice for end-stage liver disease since 1983. Cancer has emerged as a major long-term cause of death for liver transplant recipients. Many retrospective studies that have explored standardized incidence ratio have reported increased rates of solid organ cancers post-liver transplantation; some have also studied risk factors. Liver transplantation results in a two to five-fold mean increase in the rate of solid organ cancers. Risk of head and neck, lung, esophageal, cervical cancers and Kaposi’s sarcoma is high, but risk of colorectal cancer is not clearly demonstrated. There appears to be no excess risk of developing breast or prostate cancer. Environmental risk factors such as viral infection and tobacco consumption, and personal risk factors such as obesity play a key role, but recent data also implicate the role of calcineurin inhibitors, whose cumulative and dose-dependent effects on cell metabolism might play a direct role in oncogenesis. In this paper, we review the results of studies assessing the incidence of non-skin solid tumors in order to understand the mechanisms underlying solid cancers in post-liver transplant patients and, ultimately, discuss how to prevent these cancers. Immunosuppressive protocol changes, including a calcineurin inhibitor-free regimen, combined with dietary guidelines and smoking cessation, are theoretically the best preventive measures.

How are cancer and connective tissue diseases related to sarcoidosis?

PURPOSE OF REVIEW

Several studies have suggested an association between sarcoidosis and cancer, and between sarcoidosis and connective tissue diseases (CTDs). In this review, we discuss the evidence supporting and refuting these associations.

RECENT FINDINGS

In terms of a cancer risk in sarcoidosis patients, the data are somewhat conflicting but generally show a very small increased risk. The data supporting an association between sarcoidosis and CTD are not as robust as for cancer. However, it appears that scleroderma is the CTD most strongly associated with sarcoidosis.

SUMMARY

There are several important clinical and research-related implications of the association of sarcoidosis and CTDs. First, rigorous efforts should be made to exclude alternative causes for granulomatous inflammation before establishing a diagnosis of sarcoidosis. Second, the association between sarcoidosis and both cancer and CTDs may yield important insights into the immunopathogenesis of all three diseases. Finally, these data provide insight in answering a common question asked by sarcoidosis patients, 'Am I at an increased risk of developing cancer?' We believe that although there is an increased (relative) risk of cancer in sarcoidosis patients compared with the general population, that increased risk is quite small (low absolute risk).