Anaplastic transformation of thyroid follicular neoplastic and p53 expression - Montenegro, Fábio Luiz de Menezes; Silva Filho, Gilberto de Britto e; Arap, Sami; Cavalheiro, B. G.; Tavares, M. R.; Nishio, S.; Castro, I. V.; Ferraz, Alberto Rossetti (International Cancer Congress, 1998)