Central granular cell odontogenic tumor . Immuno-histochemical study of two cases - Sousa, Suzana Cantanhede Orsini Machado de; Araújo, Ney Soares de; Melhado, Ronaldo Maia; Araújo, Vera Cavalcanti de (Annual Meeting of American Academy of Oral and Maxillofacial Pathology, 1996)