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      Lipomas of the oral cavity: clinical findings, histological classification and proliferative activity of 46 cases.

      International journal of oral and maxillofacial surgery
      Tongue Neoplasms, Proliferating Cell Nuclear Antigen, Ki-67 Antigen, Mouth Mucosa, pathology, Humans, Retrospective Studies, Mouth Floor, Aged, Child, analysis, Mouth Neoplasms, Lip Neoplasms, Salivary Gland Neoplasms, Salivary Glands, Minor, Aged, 80 and over, Lipoma, Brazil, classification, Adult, Middle Aged, Adolescent, Immunohistochemistry, Male, Female, Cell Division

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          Abstract

          Lipomas represent about 1 to 5% of all neoplasms of the oral cavity. Although relatively common, few large series of intraoral lipomas and its variants are seen in the literature. Therefore, the authors present the clinical, histological and immunohistochemical features of 46 cases of intraoral lipomas reviewed from the files of the University of Campinas Dental School from 1970 to 2001. Most of the cases affected adults, without gender predilection, and the main involved sites were the buccal mucosa (21 cases), tongue (six cases), lips (six cases) and floor of mouth (five cases). The histological analysis revealed 21 cases of lipoma, 18 fibrolipomas, four intramuscular lipomas, two minor salivary gland lipomas and one spindle cell lipoma. PCNA and ki-67 expression indexes were higher in spindle cell lipoma, intramuscular lipomas and fibrolipomas compared to common lipomas, but the differences were not statistically significant. All lesions were removed surgically and none showed recurrence, regardless of the various proliferative activities.

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