Prognostic significance of Ki-67 in great cell undifferentiated carcinoma of the major salivary glands: study of 11 cases

摘要

INTRODUCTION: To establish the relation between the biologic behaviour and the prognosis of the undifferentatiated carcinoma of major salivary glands. OBJECTIVE: Identification of clinical histological, imunohistochemical parameters and its influence on the prognosis. STUDY DESIGN: Specimens analysis through histological and imunoihistochemical procedures. MATERIAL AND METHOD: Eleven cases of Undifferentiated Carcinoma of Major Salivary Glands were diagnosed and treated at the Head and Neck and Otorhinolaryngology Department of Hospital Heliópolis, Hosphel, São Paulo, from 1977 to 2000. These specimens were reviewed through histological and imunohistochemical procedures, and sub classified for positivity profile of citokeratines (high and low molecular weights). Then, it was defined a bi-directional pattern of histogenetic differentiation (mucoepidermoid type) and unidirectional pattern (epidermoid or ductal/glandular types), and its relation to clinic-demographic, mitotic index and cellular imunoproliferation (Ki- 67) clone MB-1, concerning to biological behaviour of these neoplasias. RESULTS: showed the predominance of patients withy more than 40 years old, white, parotid gland location and aggressiveness since early stages (T1 e T2). The mitotic and cellular imunoproliferative index (Ki-67) revealed values of high malignancy neoplasias (p0,01) as mucoepidemoid, cystic adenoid and acinar carcinoma. CONCLUSION: The imunohistochemical subclassification positivity for citokeratines, did not show statistical differences between mitotic and cellular imunoproliferative index (Ki-67), relating to predictive prognosis of these neoplasias.