Pericardial multicystic proliferation.
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.
D'Errico
A
A
Department of Histopathology, University of Bologna, Italy.
Grigioni
W F
WF
Baccarini
P
P
Pasquinelli
G A
GA
Gubinelli
M
M
Mancini
A M
AM
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*