Study of histopathological, morphological and immunohistochemical features of recurrent pleomorphic adenoma: an attempt to predict recurrence of pleomorphic adenoma

Autor(es)

Soares, Andresa Borges ^{[1, 2]} ; Altemani, Albina ^[3] ; de Araujo, Vera Cavalcanti ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Sao Leopoldo Mand Inst, Campinas, SP - Brazil

^[2] Res Ctr, Campinas, SP - Brazil

^[3] State Univ Campinas UNICAMP, Dept Pathol, Sch Med, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ORAL PATHOLOGY & MEDICINE; v. 40, n. 4, p. 352-358, APR 2011.
• Citações Web of Science: 11

Resumo

Background: Recurrent pleomorphic adenoma (RPA) is an uncommon and challenging disease. The aim of this study was to review the clinical information obtained by examining RPA patients, to determine its histomorphological features and to verify the expression of the Mcm-2 markers of cell proliferation and the expression of p-53 in pleomorphic adenoma (PA), RPA, and RPA with malignant transformation (TRPA). Methods: A total of 10 cases of PA and 29 cases of RPA were examined in detail for the presence of nodules and their histomorphological features. Cell proliferation and expression of p-53 were detected by the immunohistochemical technique using the antibodies against Mcm-2 and p-53. Results: Histopathologically, RPA is very similar to PA; the only difference found was that all the cases of RPA were multinodular. When comparing primary and recurrent tumor, no significant difference was found in terms of cell proliferation and the expression of p-53; however, in the RPA with areas of malignant transformation there was an increased expression of these proteins. Conclusion: This study showed that recurrences were multinodular, with nodules varying in numbers and sizes. No significant difference in histological features was found between RPA and PA. Moreover, the immunohistochemical study showed a low expression of p-53 and Mcm-2 in PA and RPA and an increased expression of these proteins in the RPA with areas of malignant transformation. (AU)

• Processo FAPESP: 07/55206-1 - Adenoma pleomórfico recidivado: fatores de risco para recidiva e transformação maligna
• Beneficiário: Andresa Borges Soares
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 08/50167-0 - Adenoma pleomórfico recidivado: fatores de risco para recidiva e transformação maligna
• Beneficiário: Vera Cavalcanti de Araujo
• Modalidade de apoio: Auxílio à Pesquisa - Regular