Clinical vignette A 34-year-old woman with a history of chronic HCV-related cirrhosis was admitted to the hospital emergency department for an acute decompensation characterised by jaundice and ascites. A diagnosis of community-acquired spontaneous bacterial peritonitis complicated by bacteraemia with Escherichia coli was made. Despite prompt, adequate antibiotic treatment (ceftriaxone for 7 days), albumin infusion and adequate response (decrease of at least 25% of ascitic neutrophils at 48 h after the start of antibiotic), physicians observed a severe clinical deterioration with the development of neurological and respiratory failure. The patient was referred to the intensive care unit of University Hospital. At admission, the patient was mechanically ventilated with severe respiratory parameters (low tidal volume, positive end expiratory pressure [PEEP] of 15 cm H 2 O and fractional inspired oxygen [FiO 2 ] 50%, resulting in arterial oxygen partial pressure [PaO 2 ] of 61 mmHg, PaO 2 /FiO 2 ratio of 122), stage IV hepatic encephalopathy, type I hepatorenal syndrome that responded to terlipressin 4 mg per day (creatinine 1.1 mg/dl), international normalized ratio (INR) 3.58, and total bilirubin 22 mg/dl. Thoracic computed tomography showed slight bilateral pleural effusion and left basal condensation. A systematic microbiological screening including bronchoalveolar lavage, blood, urinary and ascitic cultures did not demonstrate any overt infection. After three days of intensive management, the clinical situation did not improve significantly (mechanical ventilation with PEEP 12 cmH 2 O, FiO 2 50%, PaO 2 65 mmHg and a PaO 2 /FiO 2 ratio of 130, stage IV hepatic encephalopathy, serum ammonia level of 376 lg/dl, INR 2.98, total bilirubin 30 mg/dl, creatinine 0.9 mg/dl under terlipressin 4 mg per day). Thus, orthotopic liver transplantation was considered the only long-term life-saving option for this patient. However, this candidate seemed to be too sick to receive an organ. This case prompts many clinical questions, including: I. Are there specificities in this acute decompensation of cirrhosis? Is the concept of ACLF relevant for this case? II. Which precipitating events and pathogenic mechanisms are responsible for ACLF? III. Do we have tools to predict outcomes and clinical courses for ACLF? IV. What are the current management strategies, supported by evidence, for patients with ACLF? V. Is salvage liver transplantation a reasonable therapeutic option for ACLF? What is the ideal timing for liver transplantation? VI. Are there therapeutic (including experimental) strategies to improve survival or to bridge the patient to liver transplantation?