Renal dysfunction is frequent in cirrhotic patients and is associated with a worse prognosis. 1 Cirrhotic patients share with the general population common aetiologies of kidney dysfunction, including pre-renal, intrinsic and post-renal causes of acute kidney injury (AKI), as well as all the known causes of chronic kidney disease (CKD), such as diabetic or hypertensive nephropathy. 2 Additionally, they may suffer from a specific kind of renal dysfunction, hepatorenal syndrome (HRS). 3,4 Among patients hospitalized for acutely decompensated cirrhosis, about 50% present AKI (definition in Table 1) 5 ; in one-third of them, renal impairment occurs after admission. 6,7 Episodes of AKI can also occur during the follow-up in up to 50% of outpatients with decompensated cirrhosis. 8 As regards CKD (definition in Table 2), 9 this is a highly common comorbidity among patients with liver diseases, and particularly among those with decompensated cirrhosis, in whom the prevalence of CKD stage 3 or higher is reported to range from 20% to 40%. [10][11][12][13]