GPT and neoplasm: The ratio of aspartate aminotransferase [AST]/alanine aminotransferase [ALT] in the pretherapeutic blood serum or heparin plasma, the so-called ‘’De Ritis ratio’’ [20], has been recently reported to be a valuable and independent prognostic factor in the treatment of different tumor entities [21,22,23,24,25,26,27,28,29].