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Open research questions in Liver Disease and Transplantation

637 gap statements mined from Liver Disease and Transplantation papers in our 7.9M-paper local library, which holds 3,223 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • The neuroimaging characteristics of hyperammonemic encephalopathy associated with sepsis-induced liver injury are not well understood. Prior work has not fully described the MRI features of this condition. There is a need for further research on the pathogenesis of sepsis-induced liver injury.

    Neuroimaging findings in hyperammonemic encephalopathy associated with sepsis-induced liver injury: a pilot case series · 2026 · DOI

  • Non-invasive tests are degraded by obesity, leaving a clinically meaningful grey zone. No non-invasive rule-in for clinically significant portal hypertension reaches a 90% positive predictive value in obese MASLD. Current diagnostic and therapeutic pathways may leave relevant uncertainty in clinical scenarios.

    Endohepatology in the Management of Portal Hypertension in Metabolic Dysfunction‐Associated Steatotic Liver Disease · 2026 · DOI

  • The paper identifies the lack of standardized ACLF definitions as a limitation. The authors acknowledge the retrospective nature and cohort size as limitations of their study. The study highlights the need for future prospective studies using larger cohorts and dynamic statistical approaches.

    Comments on Prognostic Role of Acute-on-Chronic Liver Failure in Acute Variceal Bleeding: A Multicenter Retrospective Study in Australia: Reply · 2026 · DOI

  • It also highlights the need for a more comprehensive understanding of the mechanisms underlying lymphatic failure. The paper notes the limitations of current therapeutic strategies in addressing lymphatic dysfunction in cirrhosis.

    The “Weeping Liver” and Beyond: A Perspective on Lymphatic Failure in Liver Cirrhosis · 2026 · DOI

  • There is a need for a multicenter study to evaluate the long-term effects of rifaximin administration on the liver functional reserve. Prior studies have primarily focused on the efficacy of rifaximin for hepatic encephalopathy, with limited data on its effects on the liver functional reserve.

    C-Reactive Protein Levels Predict Improvement in the Liver Functional Reserve by Long-Term Rifaximin Treatment · 2025 · DOI

  • The current understanding of the relationship between endothelial dysfunction and liver cirrhosis is limited. There is a need to explore the complex hemodynamic changes occurring in the early and late stages of the disease.

    Endothelial Dysfunction and Liver Cirrhosis: Unraveling of a Complex Relationship · 2024 · DOI

  • There is a lack of understanding of the immunological consequences of liver failure. The mechanisms underlying immunosuppression in liver failure are not fully understood. The role of cytokines, chemokines, growth factors, and lipid mediators in immune dysregulation is not fully elucidated.

    The Impact of Liver Failure on the Immune System · 2024 · DOI

  • However, the correlation between sarcopenia and recompensation has not been determined until now.

    Sarcopenia Predicts the Recompensation in Patients With Decompensated Cirrhosis · 2026 · DOI

  • Limited data exist regarding the portal hypertension progression in cirrhotic patients with variceal bleeding as the initial decompensation event.

    Long-Term Outcomes After Endoscopic Sequential Therapy in Patients With Gastroesophageal Variceal Bleeding as the First Decompensated Event · 2026 · DOI

  • BACKGROUND/AIMS: Emergency department (ED) utilization is a major driver of healthcare costs in cirrhosis, yet the burden of preventable ED visits (EDVs) is understudied.

    Preventable Visits to the Emergency Department in Patients with Cirrhosis · 2026 · DOI

  • Nevertheless, HPS still remains an understudied condition, resulting in limited understanding of the disease and the current lack of treatment options.

    Preclinical Insights Into the Pathophysiology of Hepatopulmonary Syndrome · 2026 · DOI

  • The cirrhotic liver's metabolic capacity remains incompletely characterized, particularly its role in shaping portal metabolite signals that reach the systemic circulation.

    Transhepatic Gradients Reveal Selective Hepatic Processing Defects With Systemic Consequences in Cirrhosis · 2026 · DOI

  • Acute-on-chronic liver failure (ACLF) is a fatal syndrome defined by hepatic decompensation and systemic inflammation, yet the underlying cellular networks remain elusive.

    Single‐Cell Analysis of Hepatic Non‐Parenchymal Cells Reveals Endothelial Dysfunction and Altered Endothelial and B Cell Communication in Acute‐on‐Chronic Liver Failure · 2026 · DOI

  • Despite its clinical significance, the mechanistic underpinnings of ACLF remain poorly defined, limiting the development of effective diagnostic and therapeutic strategies.

    Metabolic Signatures of Acinetobacter baumannii and Klebsiella pneumoniae Infections in Acute-on-chronic Liver Failure · 2025 · DOI

  • Although this association is not evident in LTRs, higher total BCAA levels are strongly linked to an increased risk of new-onset type 2 diabetes, warranting further investigation.

    Branched‐chain amino acids and all‐cause mortality in patients with liver cirrhosis, and the onset of diabetes in liver transplant recipients · 2025 · DOI

  • Higher immature granulocyte levels have a predictive role in several clinical conditions, although data concerning cirrhosis are scarce.

    The impact of immature granulocytes on the outcome of patients with decompensated cirrhosis · 2025 · DOI

  • It remains unclear whether the addition of non-selective beta-blockers (NSBB) provides further benefit after combined use of tissue adhesive and endoscopic variceal ligation for bleeding gastroesophageal varices.

    Secondary Prophylaxis of Cirrhotic Gastric Variceal Bleeding: Addition of Non‐Selective Beta‐Blockers to Endoscopic Combined Treatment · 2024 · DOI

  • The relationship between ascites pressure, ascites volume, and patient discomfort has not been elucidated.

    The physiological determinants of symptom burden in cirrhosis with ascites · 2024 · DOI

  • This narrative review aims to summarize the current knowledge on the association between PSVD and systemic autoimmune diseases, emphasizing the importance of promptly recognizing this condition in the rheumatological practice, and highlighting the key aspects where further research is necessary from both pathogenic and clinical perspectives.

    The autoimmune landscape of Porto-sinusoidal vascular disorder: What the rheumatologist needs to know · 2024 · DOI

  • Data on the relationship between bacterial translocation, hepatic encephalopathy (HE), and mortality are scarce.

    Bacterial DNA Translocation Is Associated With Overt Hepatic Encephalopathy and Mortality in Patients With Cirrhosis · 2024 · DOI

  • The utility of non-invasive tests for clinically significant portal hypertension in patients with hepatocellular carcinoma is controversial. Established criteria have a low positive predictive value for ruling-in clinically significant portal hypertension.

    Blood‐ and Liver Stiffness‐Based Non‐Invasive Tests for Clinically Significant Portal Hypertension in Patients With cACLD and HCC · 2026 · DOI

  • The existing prognostic scores, such as GBS and Rockall, have limited predictive value for mortality and rebleeding in AVB patients. The Child-Pugh and MELD scores do not reflect bleeding severity.

    Is There a Role for the Neutrophil-to-Lymphocyte Ratio for Rebleeding and Mortality Risk Prediction in Acute Variceal Bleeding? A Comparative 5-Year Retrospective Study · 2025 · DOI

  • Factors associated with decline of hepatic function and increase in portal-systemic shunting, which herald clinical outcome in persons with compensated cirrhosis, are poorly characterized.

    HMG-CoA Reductase Inhibitors (Statins) May Preserve Hepatic Function and Reduce Portal-Systemic Shunting in Compensated Advanced Chronic Liver Disease: Results From the SHUNT-V Study · 2026 · DOI

  • Complications related to portal hypertension (PH) in patients with alcohol-related liver disease (ALD) can be controlled by transjugular intrahepatic portosystemic shunt (TIPS) placement; however, the impact of ongoing alcohol use (AU) after TIPS remains scarcely investigated.

    Alcohol Use After TIPS Implantation Significantly Increases the Risk of ACLF and Liver‐Related Death · 2025 · DOI

  • In conclusion, CHE is an underrecognized but critical condition that requires greater clinical attention.

    New Simple and Fast Digital Screening Method for Minimal Hepatic Encephalopathy in Cirrhotic Patients · 2025 · DOI

Most-cited papers in Liver Disease and Transplantation

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Open questions raised by papers listed on this page include: (1) The neuroimaging characteristics of hyperammonemic encephalopathy associated with sepsis-induced liver injury are not well understood (“Neuroimaging findings in hyperammonemic encephalopathy associated with…”, 2026); (2) The paper identifies the lack of standardized ACLF definitions as a limitation (“Comments on Prognostic Role of Acute-on-Chronic Liver Failure in Acute Variceal…”, 2026); (3) HPS still remains an understudied condition, resulting in limited understanding of the disease and the current lack of treatment options (“Preclinical Insights Into the Pathophysiology of Hepatopulmonary Syndrome”, 2026); (4) The cirrhotic liver's metabolic capacity remains incompletely characterized, particularly its role in shaping portal metabolite signals that reach the systemic circulation (“Transhepatic Gradients Reveal Selective Hepatic Processing Defects With…”, 2026); (5) Acute-on-chronic liver failure (ACLF) is a fatal syndrome defined by hepatic decompensation and systemic inflammation, yet the underlying cellular networks remain elusive (“Single‐Cell Analysis of Hepatic Non‐Parenchymal Cells Reveals Endothelial…”, 2026). 637 gap statements have been mined from Liver Disease and Transplantation papers in our 7.9M-paper local library, which holds 3,223 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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