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Browsing by Author "Peker, O"

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    Article
    Immunohistochemical Study on Histogenesis of Congenital Epulis and Review of the Literature
    (Blackwell Science, 1997) Ugras, S; Demirtas, I; Bekerecioglu, M; Kutluhan, A; Karakok, M; Peker, O
    Congenital epulis is a very rare lesion found only in newborn infants. This tumor is multiple in about 10% of reported cases, rarely with the simultaneous involvement of the maxilla and mandibula, as in this article. In the presented case, light microscopy demonstrated large eosinophilic granular cells arranged in solid nests that are separated by thin fibrovascular areas. The tumors in the maxilla and mandibula were investigated with a panel of polyclonal and monoclonal antibodies, and using immunoperoxidase methods on formalin-fixed, paraffin-embedded sections. Immunohistochemical studies revealed strong and diffuse cytoplasmic staining for neuron specific enolase and vimentin. However, all other reactions were negative. These results suggest that the congenital epulis may be derived from uncommitted nerve-related mesenchymal cells.
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    Article
    Primary Leiomyosarcoma of the Breast
    (Springer verlag, 1997) Ugras, S; Dilek, ON; Karaayvaz, M; Dilek, H; Peker, O; Barut, I
    Sarcomas of the breast are rare, accounting for about 1% of all malignant breast tumors. Leiomyosarcoma of the breast was an almost unknown tumor until some 20 years ago, and the few previously published cases lacked detailed information. Only 11 well-documented cases of leiomyosarcoma of the breast had been reported in the literature up to February 1992. The clinical features, diagnosis, therapy, and prognosis are discussed here in the light of the previously published literature.