title: Pericardial multicystic proliferation.
abstract: We report the case of an intrapericardial lesion with the pathological features of a multilocular cyst, found on the adventitia of an aortic aneurysm in a 62-yr-old man. Microscopically, it consisted of numerous cavities lined by flattened or cuboidal cells with the immunocytochemical and electron microscopical features of mesothelium, sometimes forming a hyperplastic pattern. Numerous nerve bundles and collections of inflammatory cells were present in the stroma. These features were consistent with a reactive lesion.
authors.affiliation: Department of Histopathology, University of Bologna, Italy.
authors.forename: A
authors.initials: A
authors.lastname: D'Errico
authors.forename: W F
authors.initials: WF
authors.lastname: Grigioni
authors.forename: P
authors.initials: P
authors.lastname: Baccarini
authors.forename: G A
authors.initials: GA
authors.lastname: Pasquinelli
authors.forename: M
authors.initials: M
authors.lastname: Gubinelli
authors.forename: A M
authors.initials: AM
authors.lastname: Mancini
mesh_terms: D001014:Aortic Aneurysm / Q000150:complications; D003560:Cysts / Q000150:complications / Q000473:pathology*; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D010496:Pericardium / Q000473:pathology*