EASL 2026 Consensus: AATD-Liver Disease Management Standardised

Alpha-1 Antitrypsin Deficiency (AATD) is an inherited disorder caused by mutations in the SERPINA1 gene, leading to reduced or dysfunctional alpha-1 antitrypsin (AAT) protein levels. The most common severe deficiency allele is the Z allele (PiZZ genotype), which results in the polymerisation and retention of misfolded AAT protein within hepatocytes. This accumulation triggers endoplasmic reticulum stress, inflammation, and apoptosis, culminating in a spectrum of liver pathologies ranging from neonatal cholestasis to cirrhosis and hepatocellular carcinoma (HCC) in adults.¹ Despite the established link between AATD and liver disease, diagnostic practices and management strategies have historically lacked uniformity, often leading to delayed diagnosis and suboptimal patient outcomes.² The clinical presentation of AATD-related liver disease is highly variable, influenced by genetic modifiers and environmental factors. While some individuals with the PiZZ genotype remain asymptomatic throughout their lives, others develop severe, progressive liver disease requiring transplantation. This variability underscores the need for standardised approaches to identify at-risk individuals and manage their disease effectively.

The EASL 2026 Consensus Statement

The EASL 2026 consensus statement was developed by an international panel of hepatologists, geneticists, and pulmonologists, aiming to provide evidence-based recommendations for the diagnosis, surveillance, and management of AATD-related liver disease. The panel reviewed existing literature, clinical guidelines, and expert opinions to formulate a comprehensive set of recommendations. The primary objective was to establish clear diagnostic pathways and management algorithms for both paediatric and adult patients with AATD-associated liver involvement.³ The methodology involved a systematic review of published studies, including observational cohorts, case series, and relevant basic science research. Expert consensus was achieved through a modified Delphi process, ensuring broad representation of clinical experience and scientific expertise from various geographical regions. This rigorous approach aimed to address the historical inconsistencies in AATD-liver disease management.

The consensus emphasises the importance of early diagnosis, particularly in individuals with the PiZZ genotype. It recommends AATD screening in all paediatric patients presenting with unexplained cholestasis, elevated transaminases, or hepatomegaly. For adults, screening is advised for those with cryptogenic cirrhosis, unexplained chronic hepatitis, or a family history of AATD. The diagnostic algorithm includes initial measurement of serum AAT levels, followed by genotyping for confirmation of deficiency alleles.⁴ This proactive screening strategy aims to identify patients before the onset of advanced liver disease, allowing for earlier intervention and potentially preventing irreversible damage. The consensus also highlights the importance of considering AATD in patients undergoing evaluation for liver transplantation, given its implications for post-transplant outcomes and family screening.

For surveillance, the consensus recommends regular monitoring of liver function tests (LFTs), synthetic function, and imaging studies. In paediatric patients with PiZZ AATD, annual LFTs and clinical assessment are advised. For adults with established liver disease, surveillance for cirrhosis and HCC is aligned with general guidelines for chronic liver disease, including ultrasound every 6 months and alpha-fetoprotein (AFP) measurement. The consensus specifically highlights that patients with PiZZ AATD have a 20-30% lifetime risk of developing clinically significant liver disease, including cirrhosis and HCC.⁵ This risk stratification is crucial for tailoring surveillance intensity and frequency, ensuring that high-risk individuals receive appropriate monitoring to detect complications early.

Management recommendations are largely supportive, focusing on preventing disease progression and managing complications. Lifestyle modifications, including avoidance of alcohol and maintenance of a healthy weight, are strongly encouraged. Vaccination against hepatitis A and B is also recommended. For patients with advanced liver disease, the consensus reinforces that liver transplantation remains the only definitive treatment. It notes that augmentation therapy, while standard for pulmonary AATD, has not demonstrated significant benefit in preventing or reversing liver disease progression in clinical trials.⁶ However, ongoing research into novel therapeutic approaches, such as gene therapy and small molecule chaperones, is acknowledged as a future direction.⁷ These emerging therapies aim to address the underlying protein misfolding and accumulation, offering potential disease-modifying strategies beyond symptomatic management.

The consensus also addresses the management of specific complications. For portal hypertension, standard pharmacological and endoscopic interventions are recommended. In cases of HCC, treatment decisions should follow established oncological guidelines, with consideration for the underlying AATD. The panel acknowledged limitations in the current evidence base, particularly regarding the efficacy of specific interventions beyond liver transplantation. Many recommendations are based on expert opinion due to the rarity of the condition and the absence of large-scale randomised controlled trials for liver-specific outcomes. Further research is needed to evaluate novel therapies and refine risk stratification models for AATD-related liver disease.⁸ The limited availability of robust clinical trial data for liver outcomes in AATD reflects the challenges of studying rare diseases. Future research efforts should focus on international collaborations and registries to gather sufficient data to conduct well-powered studies and develop more evidence-based therapeutic strategies.