Myoepithelioma
Mostrando 1-7 de 7 artigos, teses e dissertações.
-
1. Study of the expression of Mdm2, P53, P21, and AKT proteins in benign neoplasms from salivary gland / Estudo da expressão das proteínas MDM2, P53, P21WAF1 e AKT em neoplasias benignas de glândula salivar
The P53 protein can be altered in virtually all human cancers and in the absence of mutations, P53 inactivation is possible via complex formation with others proteins, such as the Mdm2. Previous studies from our laboratory showed overexpression of mdm2 and lack of p53 expression in pleomorphic adenomas. The aim of this study was to analyze the expression of
Publicado em: 2006
-
2. Estudo imunohistoquimico e analise univariada dos fatores prognosticos de tumores de glandula submandibular
The aim of this work was to analyze c1inocopathological and immunohistochemical expression in submandibular salivary gland tumors. A total of 112 tumors was evaluated, being 61 benign and 51 malignant. The benign tumors were compose of 60 pleomorphic adenomas and 1 basal cell adenoma. Among the malignancies, 23 were adenoid cystic carcinoma, 16 mucoepidermoi
Publicado em: 2002
-
3. Clear cell mammary malignant myoepithelioma with abundant glycogens.
Malignant myoepithelioma (myoepithelial carcinoma) of the breast is extremely rare. A case is reported of a 46 year old female with clear cell mammary malignant myoepithelioma that, on histological examination, was glycogen abundant clear cell carcinoma. Immunohistochemically, the clear cells showed myoepithelial differentiation--that is, they were a smooth
-
4. Myoepithelioma of the lacrimal gland: report of a case with spindle cell morphology.
The case is described of a 23-year-old female patient presenting with unilateral proptosis, headaches, and transient epiphora. Surgery revealed an encapsulated tumour composed exclusively of spindle-shaped cells within a richly vascularised myxoid stroma. Immunohistochemical staining showed focal positivity for smooth muscle actin, vimentin, and glial fibril
-
5. Malignant myoepithelioma (myoepithelial carcinoma) of the breast: a detailed cytokeratin study.
AIMS--To study the expression of a range of cytokeratins by malignant myoepithelioma of the breast. METHODS--Immunophenotyping was carried out using a panel of antibodies on paraffin wax embedded and frozen material using immunohistochemistry and double-labelled immunofluorescence. Electron microscopy was also performed. RESULTS--The tumour cells were positi
-
6. Myoepithelial carcinoma (malignant myoepithelioma) of the parotid gland arising in a pleomorphic adenoma.
A myoepithelial carcinoma, a rare malignant salivary gland neoplasm, arose in a pleomorphic adenoma of the parotid gland. The initial tumour was a pleomorphic adenoma with epithelial and myoepithelial elements. Subsequently the tumour recurred twice and was characterised by invasion of the mandible. Histological examination of the second recurrence showed a
-
7. Immunoexpression of c-erbB-2 and p53 in benign and malignant salivary neoplasms with myoepithelial differentiation.
AIM: To evaluate whether the immunoexpression of c-erbB-2 and p53 is involved in the pathogenesis and progression of salivary tumours with myoepithelial differentiation. METHODS: 233 tumours from 211 patients were studied. These included 76 primary and 24 recurrent adenocarcinomas (polymorphous low grade adenocarcinoma, 13; epithelial-myoepithelial carcinoma