Cirrhotic subjects: Clinical diagnosis by AASLD criteria HCC can be defined in cirrhotic subjects by one imaging technique (CT scan, MRI, or second generation contrast ultrasound) showing a nodule larger than 2cm with contrast uptake in the arterial phase and washout in venous or late phases, or two imaging techniques showing this radiological behaviour for nodules of 1-2cm in diameter Cytohistological confirmation is required for subjects who do not fulfill these eligibility criteria