1,721,110 research outputs found
Epidemiologic study of modality and state of preservation of dentures and the possible presence of mucosa lesions in subjects with removable dentures
No full textTongue metastasis from a malignant diffuse mesothelioma of the pleura: report of a case.
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Differentiation of odontogenic keratocysts from other odontogenic cysts by the expression of bcl-2 immunoreactivity.
No full textOdontogenic keratocysts (OKC) present an aggressive course with a marked tendency to recurrence. The epithelium of OKC is thought to have an intrinsic growth potential and has been shown to present a higher rate of proliferation as compared to other types of cyst. bcl-2 has a role in the extension of cell survival. The objective of the present study was to evaluate the bcl-2 protein expression in different odontogenic cysts. A total of 19 dentigerous cysts (DC), 20 radicular cysts (RC) and 14 OKC were used in the present study. DC and RC showed an almost complete negativity for bcl-2. OKC, on the other hand, presented in all cases a strong positivity in the cells of the basal layer, with, in most cases, more than 50% of the cells positive. This bcl-2 positivity of the basal layer of OKC could point to an abnormal control of the cell cycle. The bcl-2 protein overexpression could then produce an increase in the survival of the epithelial cells, and this increased lifespan could, in turn, lead to the peculiar aggressive growth pattern of OKC. Moreover the bcl-2 staining can be useful to differentiate OKC from other types of odontogenic cysts
Solitary fibrous tumour of the tongue.
No full textSolitary fibrous tumour (SFT) is a neoplasm most often localised in the pleura and peritoneum. The tumour is composed of spindled fibroblastic cells arranged in a haphazard way. Recently SFT has been described in many locations. Only one case of oral SFT has been described in the cheek: this is the second case of an oral SFT located in the tongue. The differential diagnosis must be made from many soft tissue tumours. SFTs stain strongly, in almost all cases, for CD34
Gingival metastasis from a prostate adenocarcinoma: report of a case.
No full textProstate cancer is the cause of 10% of cancer-related deaths in males in the United States. Metastases are found late in the course of the disease. Metastatic tumors of the oral cavity are rare, representing about 1% of oral tumors and affect jaws much more frequently than soft tissues. Metastatic prostate cancer tends to involve the bones of the axial skeleton. In a recent review, 22 cases of metastases to the jawbones from prostate cancer were found in 390 cases. On the other hand, only 1 case of a metastasis to the oral soft tissues was reported. The authors describe the second case of oral soft tissue metastasis from a prostate cancer. The metastatic lesion was located in the gingiva. Clinicians should be aware of oral soft tissue metastases since they can be the first sign of a not yet diagnosed malignant tumor and they can be very easily confused with several different benign lesions
Myoepithelioma of the gingiva. Report of a case.
No full textMyoepithelioma is a rare form of salivary gland tumor composed entirely of myoepithelial cells. It represents about 1 to 1.5% of all salivary gland tumors and is most frequently located in the parotid. The authors present a case of myoepithelioma of the gingiva. The tumor presented a focal strong positivity for cytokeratins, a diffuse positivity for S-100 protein, and a rare focal positivity for actin. No duct formation was observed. Myoepithelioma must be differentiated from several benign and malignant epithelial and mesenchymal tumors
Antioxidant status (CoQ10 and Vit. E levels) and immunohistochemical analysis of soft tissues in periodontal diseases
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