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  • Title: Multicystic mesothelial proliferation. Immunohistochemical, ultrastructural and DNA analysis of five cases.
    Author: De Rosa G, Donofrio V, Boscaino A, Zeppa P, Staibano S.
    Journal: Virchows Arch A Pathol Anat Histopathol; 1992; 421(5):379-85. PubMed ID: 1280880.
    Abstract:
    We investigated the clinicopathological findings in five cases of multicystic mesothelial proliferation (MMP). All masses consisted of multiloculated cysts attached to pelvic organs and sometimes growing into the upper abdominal cavity. The cystic spaces were lined by flattened or cuboidal cells. The stroma showed fibrosis, oedema and chronic inflammation. Immunohistochemistry revealed strong positive staining for cytokeratin and epithelial membrane antigen, and focal positivity for vimentin and carcinoembryonic antigen. The endothelial markers were negative. Electron microscopy showed abundant surface microvilli and well-developed basal lamina. DNA analysis identified euploid cell populations in all cases. All but one case had a previous history of abdominal surgery. Despite the worrying appearance the clinical outcome was favourable in all cases; there was one recurrence. Clinical and pathological data support the hypothesis that MMP represent a reactive mesothelial proliferation and not a neoplastic process.
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