Malignant transformation of liver cell adenoma - Herman, P; Machado, M. A. C.; Volpe, P; Pugliese, V; Vianna, M R; Bacchella, Telesforo; Machado, Marcel Cerqueira César; Pinotti, Henrique Walter (Inaugural World Congress of the International Hepato-Pancreato-Biliary Association, 1994)