title: Prognostic significance of cell proliferation in mucoepidermoid carcinomas of the salivary gland: clinicopathological study using MIB 1 antibody in paraffin sections.
abstract: Mucoepidermoid carcinomas of salivary gland origin have an uncertain clinical course not directly predictable by histomorphology. The MIB 1 antibody, which detects Ki-67 antigen in formalin-fixed, paraffin-embedded tissues, was used to study cell proliferation in these tumors. An MIB 1 index was developed to express the percentage of MIB 1-positive proliferating cells, and the results were compared with histomorphological tumor grade and clinical outcome. All patients with MIB 1 indices lower than 10% in their primary tumors had a favorable clinical outcome. Most patients with MIB 1 indices higher than 10% developed a recurrent or metastasizing disease. All patients who died of their tumor or who had persistent tumor had MIB 1 indices higher than 10%. Thus, the MIB 1 index defines two virtually nonoverlapping forms of the disease, an indolent one and an aggressive one. Cell proliferation in mucoepidermoid carcinomas, assessed with the MIB 1 antibody, thus represents a significant prognostic factor for improving the accuracy of conventional histological grading.
authors.affiliation: Department of Pathology, University of Helsinki, Finland.
authors.forename: A
authors.initials: A
authors.lastname: Skalova
authors.forename: H
authors.initials: H
authors.lastname: Lehtonen
authors.forename: K
authors.initials: K
authors.lastname: von Boguslawsky
authors.forename: I
authors.initials: I
authors.lastname: Leivo
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000911:Antibodies, Monoclonal; D018277:Carcinoma, Mucoepidermoid / Q000473:pathology* / Q000503:physiopathology; D002455:Cell Division; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D008875:Middle Aged; D016612:Paraffin Embedding; D011379:Prognosis; D012468:Salivary Gland Neoplasms / Q000473:pathology* / Q000503:physiopathology
chemical_list: D000911:Antibodies, Monoclonal